try to fix some random chan_h323 compilation failures

After some debugging, the random chan_h323 build failures appear to be due
to complications introduced by some chan_h323 specific build stuff getting
triggered during a clean.  Simplify this by moving the h323 clean commands
down into channels/makefile.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@267352 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/Makefile

@@ -63,8 +63,8 @@ endif
 
 clean::
 	$(MAKE) -C misdn clean
-	if [ -f h323/Makefile ]; then $(MAKE) -C h323 clean; fi
 	rm -f sip/*.o sip/*.i
+	rm -f h323/libchanh323.a h323/Makefile.ast h323/*.o h323/*.dep
 
 dist-clean::
 	rm -f h323/Makefile

channels/h323/Makefile.in

@@ -47,4 +47,3 @@ Makefile.ast:
 	@if [ -r $@ ] && cmp -s $@ $@.tmp; then rm -f $@.tmp; else mv -f $@.tmp $@; fi
 
 clean::
-	rm -f $(TARGET) $(OBJS) Makefile.ast *.dep