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
R=r DELTA=18 (0 added, 0 deleted, 18 changed) OCL=34894 CL=34894
similar tweaks to make debug/proc, net, os build. R=r DELTA=861 (855 added, 4 deleted, 2 changed) OCL=34877 CL=34890