nacl - run tests under emulator.
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

test/nacl-pass.txt

diff --git a/test/nacl-pass.txt b/test/nacl-pass.txt
new file mode 100644
index 0000000..bd9654e
--- /dev/null
+++ b/test/nacl-pass.txt
@@ -0,0 +1,287 @@
+./64bit.go
+./args.go
+./assign.go
+./bigalg.go
+./blank.go
+./blank1.go
+./chancap.go
+./char_lit.go
+./closedchan.go
+./cmp1.go
+./complit.go
+./compos.go
+./const.go
+./const1.go
+./const2.go
+./const3.go
+./convert.go
+./convert3.go
+./convlit.go
+./convlit1.go
+./decl.go
+./declbad.go
+./empty.go
+./escape.go
+./escape1.go
+./float_lit.go
+./for.go
+./func.go
+./func1.go
+./func2.go
+./func3.go
+./func4.go
+./gc.go
+./gc1.go
+./hashmap.go
+./hilbert.go
+./if.go
+./if1.go
+./import.go
+./import1.go
+./indirect.go
+./indirect1.go
+./initcomma.go
+./initialize.go
+./initializerr.go
+./initsyscall.go
+./int_lit.go
+./intcvt.go
+./iota.go
+./literal.go
+./map.go
+./method.go
+./method1.go
+./method2.go
+./method3.go
+./named.go
+./nil.go
+./parentype.go
+./range.go
+./rename.go
+./rename1.go
+./sieve.go
+./simassign.go
+./string_lit.go
+./stringrange.go
+./switch.go
+./switch1.go
+./test0.go
+./typeswitch.go
+./typeswitch1.go
+./utf.go
+./varinit.go
+./vectors.go
+ken/array.go
+ken/chan.go
+ken/chan1.go
+ken/complit.go
+ken/divconst.go
+ken/divmod.go
+ken/embed.go
+ken/for.go
+ken/interbasic.go
+ken/interfun.go
+ken/mfunc.go
+ken/modconst.go
+ken/ptrfun.go
+ken/ptrvar.go
+ken/range.go
+ken/robfor.go
+ken/robfunc.go
+ken/robif.go
+ken/shift.go
+ken/simparray.go
+ken/simpbool.go
+ken/simpconv.go
+ken/simpfun.go
+ken/simpvar.go
+ken/slicearray.go
+ken/sliceslice.go
+ken/strvar.go
+chan/fifo.go
+chan/perm.go
+chan/select.go
+chan/sieve.go
+interface/bigdata.go
+interface/convert.go
+interface/convert1.go
+interface/convert2.go
+interface/embed.go
+interface/explicit.go
+interface/fake.go
+interface/pointer.go
+interface/receiver.go
+interface/receiver1.go
+interface/recursive.go
+interface/struct.go
+fixedbugs/bug000.go
+fixedbugs/bug001.go
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