Removed math.h include, as Windows math.h has a compile error.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@84160 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/builtins.c b/test/CodeGen/builtins.c
index 165db9c..35a588e 100644
--- a/test/CodeGen/builtins.c
+++ b/test/CodeGen/builtins.c
@@ -2,7 +2,6 @@
 // RUN: not grep __builtin %t
 
 #include <stdio.h>
-#include <math.h>
 
 void p(char *str, int x) {
   printf("%s: %d\n", str, x);
@@ -118,7 +117,7 @@
 
 
 
-void strcat() {}
+char *strcat(char *, char const *) {}
 
 void foo() {
  __builtin_strcat(0, 0);