(replacement for CL 1018053) R=r http://go/go-review/1017047
R=r DELTA=236 (211 added, 18 deleted, 7 changed) OCL=35084 CL=35131
special all-nacl.bash and test/run-nacl that run just the tests known to work under nacl. the rest requires closures. fix another bug or two in syscall. R=r DELTA=420 (410 added, 8 deleted, 2 changed) OCL=34882 CL=34907
similar tweaks to make debug/proc, net, os build. R=r DELTA=861 (855 added, 4 deleted, 2 changed) OCL=34877 CL=34890