Add mbtk_loopbuff and rtp support.

Change-Id: Idc80af4efb8ff76c4afc59fdf1d3896b453e6ff4
diff --git a/mbtk/Makefile b/mbtk/Makefile
index 4c90a12..a68830e 100755
--- a/mbtk/Makefile
+++ b/mbtk/Makefile
@@ -10,7 +10,7 @@
 
 # Build bin file.
 ifeq ($(MBTK_SOURCE_VERSION), 2)
-DIRS += mbtk_rild_v2 mbtk_servicesd_v2 mbtk_sdk_ready_v2
+DIRS += mbtk_rild_v2 mbtk_servicesd_v2 mbtk_sdk_ready_v2 mbtk_rtpd
 else
 DIRS += mbtk_rild mbtk_servicesd mbtk_sdk_ready
 endif