[Bugfix][API-347][RTP]Fix api didnot return result

Change-Id: I7c1a29de25ac1f1e2f533743d496605dedce8326
diff --git a/src/lynq/lib/liblynq-rtp/Makefile b/src/lynq/lib/liblynq-rtp/Makefile
index a96d783..2073e0f 100755
--- a/src/lynq/lib/liblynq-rtp/Makefile
+++ b/src/lynq/lib/liblynq-rtp/Makefile
@@ -31,6 +31,7 @@
 	-lutils \
 	-lcutils \
 	-llynq-log \
+	-lpthread \
 #    -llynq-log \
 
 $(warning libs=$(LOCAL_LIBS))