Call libite configure script if local libite is used

The new libite uses autotools to build, and since we use it as a GIT
submodule we have to call its autogen.sh before we call the configure
script, from within the Finit configure script.  We may have to move
to use autotools even for Finit ...

Also, make sure to only call clean/distclean on libite if the local
version is selected at configure time.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

Makefile

@@ -144,13 +144,17 @@ uninstall: uninstall-exec uninstall-data uninstall-dev
 
 clean:
 	+$(MAKE) -C plugins $@
+ifndef LIBITE
 	+$(MAKE) -C libite  $@
+endif
 	+$(MAKE) -C libuev  $@
 	-@$(RM) $(OBJS) $(DEPS) $(EXEC) 2>/dev/null
 
 distclean: clean
 	+$(MAKE) -C plugins $@
+ifndef LIBITE
 	+$(MAKE) -C libite  $@
+endif
 	+$(MAKE) -C libuev  $@
 	-@$(RM) $(JUNK) config.mk config.h unittest *.o *.html 2>/dev/null