add missing header files.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4535 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/libsndfile/tests/utils.h

@@ -30,6 +30,8 @@ extern "C" {
 #endif	/* __cplusplus */
 
 #include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
 
 #define SF_COUNT_TO_LONG(x)	((long) (x))
 #define	ARRAY_LEN(x)		((int) (sizeof (x)) / (sizeof ((x) [0])))