Handle the GNU void* and function pointer arithmetic extensions for constant expressions as well.

llvm-svn: 65013
diff --git a/clang/test/Sema/const-eval.c b/clang/test/Sema/const-eval.c
index 7307aea..a565041 100644
--- a/clang/test/Sema/const-eval.c
+++ b/clang/test/Sema/const-eval.c
@@ -32,3 +32,5 @@
 
 // ?: in constant expressions.
 int g17[(3?:1) - 2]; 
+
+EVAL_EXPR(18, (int)((void*)10 + 10));