[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/os/path_unix.go b/llgo/third_party/gofrontend/libgo/go/os/path_unix.go
index 0211107ddfc..36f8e61bf92 100644
--- a/llgo/third_party/gofrontend/libgo/go/os/path_unix.go
+++ b/llgo/third_party/gofrontend/libgo/go/os/path_unix.go
@@ -11,7 +11,7 @@ const (
 	PathListSeparator = ':' // OS-specific path list separator
 )
 
-// IsPathSeparator returns true if c is a directory separator character.
+// IsPathSeparator reports whether c is a directory separator character.
 func IsPathSeparator(c uint8) bool {
 	return PathSeparator == c
 }