Implement monitors.

Change-Id: Ifc7a801f9cbcdfbc1e1af5c905261dfadaa60f45
diff --git a/src/compiler/Dalvik.h b/src/compiler/Dalvik.h
index f4f94e2..b2c62bf 100644
--- a/src/compiler/Dalvik.h
+++ b/src/compiler/Dalvik.h
@@ -30,6 +30,7 @@
 #include "class_linker.h"
 #include "compiler.h"
 #include "dex_cache.h"
+#include "sync.h"
 #include "utils.h"
 
 // From Common.h