small patch for FreeBSD

I needed to apply the following patch to clang to get it to work for
me on amd64 under FreeBSD since we use amd64 in our platform triples
instead of x86_64.

-- Brooks

--- tools/clang/lib/Basic/Targets.cpp.orig
+++ tools/clang/lib/Basic/Targets.cpp
@@ -1012,7 +1012,7 @@
     return new SparcV8TargetInfo(T);
   }

- if (T.find("x86_64-") == 0) {
+ if (T.find("x86_64-") == 0 || T.find("amd64-") == 0) {
     if (isDarwin)
       return new DarwinX86_64TargetInfo(T);
     if (isLinux)

Thanks!
http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20090216/012849.html

-Chris