cmd/go: add some test skips for GOEXPERIMENT=nocoverageredesign

Couple of test need to be skipped for GOEXPERIMENT=nocoverageredesign,
since they use "go build -cover". [This is a test-only CL].

Change-Id: I48c0855e2d8f042f9bc293e4cf48f326682112c9
Reviewed-on: https://go-review.googlesource.com/c/go/+/495597
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>

src/cmd/go/testdata/script/cover_build_cmdline_pkgs.txt

@@ -5,6 +5,7 @@
 # inside and outside the standard library.
 
 [short] skip
+[!GOEXPERIMENT:coverageredesign] skip
 
 # Compile an object.
 go tool compile -p tiny tiny/tiny.go tiny/tiny2.go

src/cmd/go/testdata/script/cover_main_import_path.txt

@@ -4,6 +4,7 @@
 # the "main" package is handled. See issue 57169 for details.
 
 [short] skip
+[!GOEXPERIMENT:coverageredesign] skip
 
 # Build this program with -cover and run to collect a profile.
 

src/cmd/go/testdata/script/cover_sync_atomic_import.txt

@@ -1,5 +1,6 @@
 [short] skip
 [compiler:gccgo] skip # gccgo has no cover tool
+[!GOEXPERIMENT:coverageredesign] skip
 
 go test -short -cover -covermode=atomic -coverpkg=coverdep/p1 coverdep
 

src/cmd/internal/cov/read_test.go

@@ -11,6 +11,7 @@ import (
 	"internal/coverage/decodecounter"
 	"internal/coverage/decodemeta"
 	"internal/coverage/pods"
+	"internal/goexperiment"
 	"internal/testenv"
 	"os"
 	"path/filepath"
@@ -44,6 +45,9 @@ func (v *visitor) Finish()
 
 func TestIssue58411(t *testing.T) {
 	testenv.MustHaveGoBuild(t)
+	if !goexperiment.CoverageRedesign {
+		t.Skipf("skipping since this test requires 'go build -cover'")
+	}
 
 	// Build a tiny test program with -cover. Smallness is important;
 	// it is one of the factors that triggers issue 58411.