[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, 2 insertions, 2 deletions

diff --git a/llgo/third_party/gofrontend/libgo/go/path/path.go b/llgo/third_party/gofrontend/libgo/go/path/path.go
index 98a6d529229..77f2185eaec 100644
--- a/llgo/third_party/gofrontend/libgo/go/path/path.go
+++ b/llgo/third_party/gofrontend/libgo/go/path/path.go
@@ -134,7 +134,7 @@ func Clean(path string) string {
 	return out.string()
 }
 
-// Split splits path immediately following the final slash.
+// Split splits path immediately following the final slash,
 // separating it into a directory and file name component.
 // If there is no slash path, Split returns an empty dir and
 // file set to path.
@@ -192,7 +192,7 @@ func Base(path string) string {
 	return path
 }
 
-// IsAbs returns true if the path is absolute.
+// IsAbs reports whether the path is absolute.
 func IsAbs(path string) bool {
 	return len(path) > 0 && path[0] == '/'
 }