[llgo] Roll gofrontend forward

Switch gofrontend to using go.googlesource.com, and
update to 81eb6a3f425b2158c67ee32c0cc973a72ce9d6be.

There are various changes required to update to the
go 1.5 runtime:

typemap.go is changed to accommodate the change in representation for equal/hash algorithms, and the removal of the zero value/type.
CMakeLists.txt is updated to add the build tree to the package search path, so internal packages, which are not installed, are found.
various files changes due to removal of __go_new_nopointers; the same change as in D11863, but with NoUnwindAttribute added to the added runtime functions which are called with "callOnly".
minor cleanups in ssa.go while investigating issues with unwinding/panic handling.

Differential Revisision: http://reviews.llvm.org/D15188

llvm-svn: 263536

1 files changed, 1 insertions, 1 deletions

diff --git a/llgo/third_party/gofrontend/libgo/go/cmd/cgo/util.go b/llgo/third_party/gofrontend/libgo/go/cmd/cgo/util.go
index 4e7800d1272..3adb8e87836 100644
--- a/llgo/third_party/gofrontend/libgo/go/cmd/cgo/util.go
+++ b/llgo/third_party/gofrontend/libgo/go/cmd/cgo/util.go
@@ -55,7 +55,7 @@ func error_(pos token.Pos, msg string, args ...interface{}) {
 	fmt.Fprintf(os.Stderr, "\n")
 }
 
-// isName returns true if s is a valid C identifier
+// isName reports whether s is a valid C identifier
 func isName(s string) bool {
 	for i, v := range s {
 		if v != '_' && (v < 'A' || v > 'Z') && (v < 'a' || v > 'z') && (v < '0' || v > '9') {