[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, 0 insertions, 17 deletions

diff --git a/llgo/third_party/gofrontend/libgo/go/runtime/os_linux.go b/llgo/third_party/gofrontend/libgo/go/runtime/os_linux.go
deleted file mode 100644
index 41123ad5709..00000000000
--- a/llgo/third_party/gofrontend/libgo/go/runtime/os_linux.go
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright 2014 The Go Authors.  All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package runtime
-
-import "unsafe"
-
-func futex(addr unsafe.Pointer, op int32, val uint32, ts, addr2 unsafe.Pointer, val3 uint32) int32
-func clone(flags int32, stk, mm, gg, fn unsafe.Pointer) int32
-func rt_sigaction(sig uintptr, new, old unsafe.Pointer, size uintptr) int32
-func sigaltstack(new, old unsafe.Pointer)
-func setitimer(mode int32, new, old unsafe.Pointer)
-func rtsigprocmask(sig int32, new, old unsafe.Pointer, size int32)
-func getrlimit(kind int32, limit unsafe.Pointer) int32
-func raise(sig int32)
-func sched_getaffinity(pid, len uintptr, buf *uintptr) int32