Bring in 'alloca' for the Analysis/stack-addr-ps.c test case.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@58849 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Analysis/stack-addr-ps.c b/test/Analysis/stack-addr-ps.c
index 2173cac..c604753 100644
--- a/test/Analysis/stack-addr-ps.c
+++ b/test/Analysis/stack-addr-ps.c
@@ -1,6 +1,7 @@
 // RUN: clang -checker-simple -verify %s
 
 #include <stdlib.h>
+#include <malloc.h>
 
 int* f1() {
   int x = 0;