modules/ims_qos: added -lpthread to Makefile to fix on Ubuntu 12

modules/ims_qos/Makefile

@@ -17,6 +17,7 @@ SER_LIBS+=$(SERLIBPATH)/ims/kamailio_ims
 
 ifneq ($(OS),darwin)
 	LIBS += -lrt
+	LIBS += -lpthread
 endif
 
 include ../../Makefile.modules