Staticify.

Mark some functions "static".

Change-Id: Ia80bccab1f72690729e43f99783d34fe366108b2
diff --git a/vm/compiler/Frontend.c b/vm/compiler/Frontend.c
index 525ec72..7f02ea1 100644
--- a/vm/compiler/Frontend.c
+++ b/vm/compiler/Frontend.c
@@ -377,7 +377,7 @@
  * Crawl the stack of the thread that requesed compilation to see if any of the
  * ancestors are on the blacklist.
  */
-bool filterMethodByCallGraph(Thread *thread, const char *curMethodName)
+static bool filterMethodByCallGraph(Thread *thread, const char *curMethodName)
 {
     /* Crawl the Dalvik stack frames and compare the method name*/
     StackSaveArea *ssaPtr = ((StackSaveArea *) thread->curFrame) - 1;