Update prebuilts to go1.8rc1 ab/3640477

Bug: 32982374
Test: m -j blueprint_tools
Change-Id: Ife36ed9cf5b2617ccc8fdf0fdd178d19378546cd
diff --git a/src/syscall/endian_little.go b/src/syscall/endian_little.go
new file mode 100644
index 0000000..bd6f06e
--- /dev/null
+++ b/src/syscall/endian_little.go
@@ -0,0 +1,9 @@
+// Copyright 2016 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.
+//
+// +build 386 amd64 amd64p32 arm arm64 ppc64le mips64le mipsle
+
+package syscall
+
+const isBigEndian = false