Bug 1496136 - Recommend mach instead of client.mk; r=firefox-build-sy…

…stem-reviewers,nalexander

MozReview-Commit-ID: 8lPom2Sgmp

Differential Revision: https://phabricator.services.mozilla.com/D7625

client.mk

@@ -127,7 +127,7 @@ configure:: $(configure-preqs)
 	@echo $(CONFIGURE) $(CONFIGURE_ARGS)
 	@cd $(OBJDIR) && $(CONFIGURE_ENV_ARGS) $(CONFIGURE) $(CONFIGURE_ARGS) \
 	  || ( echo '*** Fix above errors and then restart with\
-               "$(MAKE) -f client.mk build"' && exit 1 )
+               "./mach build"' && exit 1 )
 	@touch $(OBJDIR)/Makefile
 	$(call BUILDSTATUS,TIER_FINISH configure)