gobuild is obsolete; don't build it (will delete eventually).

revised gotest for whole-package compilation.

R=r
DELTA=102  (68 added, 6 deleted, 28 changed)
OCL=33067
CL=33098

whole-package compilation.  new Makefiles,
tests now in separate package

	bytes
	flag
	fmt
	io
	math
	once
	os
	reflect
	strconv
	sync
	time
	utf8

delete import "xxx" in package xxx.

inside package xxx, xxx is not declared
anymore so s/xxx.//g

delete file and package level forward declarations.

note the new internal_test.go and sync
and strconv to provide public access to
internals during testing.  the installed version
of the package omits that file and thus does
not open the internals to all clients.

R=r
OCL=33065
CL=33097

8g: save AX/DX around div

R=ken
OCL=33094
CL=33096

R=ken
OCL=33063
CL=33095

R=ken
OCL=33051
CL=33051

remove "regexp." from regexp tests.

R=rsc
DELTA=1173  (1152 added, 1 deleted, 20 changed)
OCL=33028
CL=33037

R=rsc
DELTA=16  (12 added, 0 deleted, 4 changed)
OCL=33030
CL=33035

R=rsc
DELTA=80  (40 added, 40 deleted, 0 changed)
OCL=33024
CL=33027

R=r
DELTA=95  (0 added, 0 deleted, 95 changed)
OCL=33012
CL=33012

x.go:3: invalid indirect of X (type int)

was
x.go:3: invalid indirect of nil

R=ken
OCL=33008
CL=33008

- runs approx. 30% faster

R=r
DELTA=24  (10 added, 2 deleted, 12 changed)
OCL=32984
CL=33005

- wrote corresponding fast versions in fast.arith.s
- implemented in-place operations for some routines
- updated existing code to be compatible with in-place
  routines

These changes allow the pidigits benchmark to run
approx. 30% faster. Enabling the assembly routines
in fast.arith.s will give another approx. 3%.

R=r
DELTA=486  (252 added, 68 deleted, 166 changed)
OCL=32980
CL=33003

R=rsc
DELTA=90  (90 added, 0 deleted, 0 changed)
OCL=32993
CL=33001

non-addressable expressions.

R=rsc
APPROVED=rsc
DELTA=241  (202 added, 15 deleted, 24 changed)
OCL=32790
CL=32995

R=ken
OCL=32975
CL=32975

R=rsc
OCL=32971
CL=32971

AllMatchesStringIter, based on sawn and sawzall functions in sawzall.

APPROVED=rsc
DELTA=218  (218 added, 0 deleted, 0 changed)
OCL=32408
CL=32949

APPROVED=rsc
DELTA=1  (1 added, 0 deleted, 0 changed)
OCL=32948
CL=32948

R=rsc
OCL=32947
CL=32947

2. moved functions from 6g to gc
for portability to other families.
3. added rotate-carry instructions to
peek and reg.

R=rsc
OCL=32946
CL=32946

Fix octal parsing that it unearthed.

R=rsc
APPROVED=rsc
DELTA=11  (5 added, 0 deleted, 6 changed)
OCL=32924
CL=32945

R=rsc
DELTA=293  (224 added, 0 deleted, 69 changed)
OCL=32917
CL=32944

only need to fix up certain
denominators

R=rsc
OCL=32928
CL=32928

still to do - overflow, mod

R=rsc
OCL=32927
CL=32927

no real change -- disabled because of bugs

R=rsc
OCL=32923
CL=32923

- added some TODOs

DELTA=46  (15 added, 4 deleted, 27 changed)
OCL=32901
CL=32918

R=ken
OCL=32902
CL=32914

R=rsc
DELTA=514  (513 added, 0 deleted, 1 changed)
OCL=32898
CL=32910

hope this will work around Mac NFS bug
where writing to an 8.out that has crashed
recently sometimes wedges NFS.

R=r
DELTA=3  (3 added, 0 deleted, 0 changed)
OCL=32906
CL=32908

R=ken
OCL=32900
CL=32900

TBR=r
OCL=32896
CL=32896

R=ken
OCL=32890
CL=32894

R=rsc
DELTA=7  (3 added, 3 deleted, 1 changed)
OCL=32885
CL=32889

R=ken
OCL=32888
CL=32888

R=ken
OCL=32887
CL=32887

R=ken
OCL=32886
CL=32886

disable func redeclaration mismatch test;
fix golden.out

R=ken
OCL=32883
CL=32883

R=ken
OCL=32882
CL=32882

more interesting than most

R=rsc
DELTA=132  (131 added, 0 deleted, 1 changed)
OCL=32876
CL=32881

still to do:
	* initializer cycle detection
	* nicer error for type checking cycles

R=ken
OCL=32855
CL=32880