syscall: manually fix z* for NetBSD/amd64

Building go currently fails on NetBSD, thus the regeneration
scripts do not run correctly. With these changes, at least
the go_bootstrap tool builds correctly.

R=golang-dev, r, bradfitz
CC=golang-dev
https://golang.org/cl/5695064

src/pkg/syscall/zerrors_netbsd_amd64.go

@@ -907,39 +907,39 @@ const (
 	SHUT_RD                           = 0x0
 	SHUT_RDWR                         = 0x2
 	SHUT_WR                           = 0x1
-	SIGABRT                           = 0x6
-	SIGALRM                           = 0xe
-	SIGBUS                            = 0xa
-	SIGCHLD                           = 0x14
-	SIGCONT                           = 0x13
-	SIGEMT                            = 0x7
-	SIGFPE                            = 0x8
-	SIGHUP                            = 0x1
-	SIGILL                            = 0x4
-	SIGINFO                           = 0x1d
-	SIGINT                            = 0x2
-	SIGIO                             = 0x17
-	SIGIOT                            = 0x6
-	SIGKILL                           = 0x9
-	SIGPIPE                           = 0xd
-	SIGPROF                           = 0x1b
-	SIGQUIT                           = 0x3
-	SIGSEGV                           = 0xb
-	SIGSTOP                           = 0x11
-	SIGSYS                            = 0xc
-	SIGTERM                           = 0xf
-	SIGTHR                            = 0x20
-	SIGTRAP                           = 0x5
-	SIGTSTP                           = 0x12
-	SIGTTIN                           = 0x15
-	SIGTTOU                           = 0x16
-	SIGURG                            = 0x10
-	SIGUSR1                           = 0x1e
-	SIGUSR2                           = 0x1f
-	SIGVTALRM                         = 0x1a
-	SIGWINCH                          = 0x1c
-	SIGXCPU                           = 0x18
-	SIGXFSZ                           = 0x19
+	SIGABRT                           = Signal(0x6)
+	SIGALRM                           = Signal(0xe)
+	SIGBUS                            = Signal(0xa)
+	SIGCHLD                           = Signal(0x14)
+	SIGCONT                           = Signal(0x13)
+	SIGEMT                            = Signal(0x7)
+	SIGFPE                            = Signal(0x8)
+	SIGHUP                            = Signal(0x1)
+	SIGILL                            = Signal(0x4)
+	SIGINFO                           = Signal(0x1d)
+	SIGINT                            = Signal(0x2)
+	SIGIO                             = Signal(0x17)
+	SIGIOT                            = Signal(0x6)
+	SIGKILL                           = Signal(0x9)
+	SIGPIPE                           = Signal(0xd)
+	SIGPROF                           = Signal(0x1b)
+	SIGQUIT                           = Signal(0x3)
+	SIGSEGV                           = Signal(0xb)
+	SIGSTOP                           = Signal(0x11)
+	SIGSYS                            = Signal(0xc)
+	SIGTERM                           = Signal(0xf)
+	SIGTHR                            = Signal(0x20)
+	SIGTRAP                           = Signal(0x5)
+	SIGTSTP                           = Signal(0x12)
+	SIGTTIN                           = Signal(0x15)
+	SIGTTOU                           = Signal(0x16)
+	SIGURG                            = Signal(0x10)
+	SIGUSR1                           = Signal(0x1e)
+	SIGUSR2                           = Signal(0x1f)
+	SIGVTALRM                         = Signal(0x1a)
+	SIGWINCH                          = Signal(0x1c)
+	SIGXCPU                           = Signal(0x18)
+	SIGXFSZ                           = Signal(0x19)
 	SIOCADDMULTI                      = 0x80206931
 	SIOCAIFADDR                       = 0x8040691a
 	SIOCAIFGROUP                      = 0x80286987
@@ -1366,3 +1366,39 @@ var errors = [...]string{
 	90: "no message of desired type",
 	91: "not supported",
 }
+
+// Signal table
+var signals = [...]string{
+	1:  "hangup",
+	2:  "interrupt",
+	3:  "quit",
+	4:  "illegal instruction",
+	5:  "trace/BPT trap",
+	6:  "abort trap",
+	7:  "EMT trap",
+	8:  "floating point exception",
+	9:  "killed",
+	10: "bus error",
+	11: "segmentation fault",
+	12: "bad system call",
+	13: "broken pipe",
+	14: "alarm clock",
+	15: "terminated",
+	16: "urgent I/O condition",
+	17: "stopped (signal)",
+	18: "stopped",
+	19: "continued",
+	20: "child exited",
+	21: "stopped (tty input)",
+	22: "stopped (tty output)",
+	23: "I/O possible",
+	24: "cputime limit exceeded",
+	25: "filesize limit exceeded",
+	26: "virtual timer expired",
+	27: "profiling timer expired",
+	28: "window size changes",
+	29: "information request",
+	30: "user defined signal 1",
+	31: "user defined signal 2",
+	32: "power fail/restart",
+}

src/pkg/syscall/zsyscall_netbsd_amd64.go

@@ -606,7 +606,7 @@ func Issetugid() (tainted bool) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Kill(pid int, signum int) (err error) {
+func Kill(pid int, signum Signal) (err error) {
 	_, _, e1 := Syscall(SYS_KILL, uintptr(pid), uintptr(signum), 0)
 	if e1 != 0 {
 		err = e1