tweak

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@16288 d0543943-73ff-0310-b7d9-9358b9ac24b2

build/Makefile.am

-MK=`echo $(MAKE) | awk '{printf "%5s\n", $$0}' `
+MK=`echo $(MAKE) | $(AWK) '{printf "%5s\n", $$0}' `
 
 all:
 	@echo " +---------- FreeSWITCH Build Complete ----------+"