[PATCH] Initial contribution of llgo, a Go frontend

[Ed Maste]

================
Comment at: tools/llgo/README.TXT:17-18
@@ +16,4 @@
+
+llgo is currently only supported on the x86-64 Linux platform. Contributions
+that add support for other platforms are welcome.
+
----------------
Could you add a brief high-level description of platform-specific code required? I.e., where should someone who wants to support other platforms start looking?

http://reviews.llvm.org/D6327