Fix missing include of int_lib.h and ppc ifdef for FreeBSD.
Patch provided by Ed Schouten!

llvm-svn: 147458
diff --git a/compiler-rt/lib/clear_cache.c b/compiler-rt/lib/clear_cache.c
index fdd3316..b934fd4 100644
--- a/compiler-rt/lib/clear_cache.c
+++ b/compiler-rt/lib/clear_cache.c
@@ -8,6 +8,8 @@
  * ===----------------------------------------------------------------------===
  */
 
+#include "int_lib.h"
+
 #if __APPLE__
   #include <libkern/OSCacheControl.h>
 #endif