Added /frameworks/av/include to the default include search path

o related-to-bug: 6214141

Change-Id: I90de0563298fd9146ac823926426d1cffd815c2d
diff --git a/core/config.mk b/core/config.mk
index 6383113..11c6751 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -31,6 +31,7 @@
 	$(TOPDIR)dalvik/libnativehelper/include \
 	$(TOPDIR)frameworks/native/include \
 	$(TOPDIR)frameworks/native/opengl/include \
+	$(TOPDIR)frameworks/av/include \
 	$(TOPDIR)frameworks/base/include \
 	$(TOPDIR)frameworks/base/opengl/include \
 	$(TOPDIR)frameworks/base/native/include \