[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, 1 deletions

diff --git a/llgo/third_party/gofrontend/libgo/go/net/rpc/server.go b/llgo/third_party/gofrontend/libgo/go/net/rpc/server.go
index 83728d55a18..6e6e8819174 100644
--- a/llgo/third_party/gofrontend/libgo/go/net/rpc/server.go
+++ b/llgo/third_party/gofrontend/libgo/go/net/rpc/server.go
@@ -13,6 +13,7 @@
 	Only methods that satisfy these criteria will be made available for remote access;
 	other methods will be ignored:
 
+		- the method's type is exported.
 		- the method is exported.
 		- the method has two arguments, both exported (or builtin) types.
 		- the method's second argument is a pointer.
@@ -216,7 +217,7 @@ func isExportedOrBuiltinType(t reflect.Type) bool {
 
 // Register publishes in the server the set of methods of the
 // receiver value that satisfy the following conditions:
-//	- exported method
+//	- exported method of exported type
 //	- two arguments, both of exported type
 //	- the second argument is a pointer
 //	- one return value, of type error