[PATCH] Split off CUDA-specific Sema parts to a new file

[Peter Collingbourne]

LGTM modulo nit.

================
Comment at: lib/Sema/SemaCUDA.cpp:14
@@ +13,3 @@
+
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Decl.h"
----------------
You should include clang/Sema/Sema.h first per the coding standards.

http://reviews.llvm.org/D5160