Bug 457753 - Make sure the package path directory exists before trying to package tests into it. r=ted

--HG--
extra : rebase_source : a87b91528fab9b95d11d697fb54e1f96ca564b2c

testing/testsuite-targets.mk

@@ -113,6 +113,7 @@ include $(topsrcdir)/toolkit/mozapps/installer/package-name.mk
 PKG_STAGE = $(DIST)/test-package-stage
 
 package-tests: stage-mochitest stage-reftest stage-xpcshell
+	$(NSINSTALL) -D $(DIST)/$(PKG_PATH)
 	@(cd $(PKG_STAGE) && tar $(TAR_CREATE_FLAGS) - *) | bzip2 -f > $(DIST)/$(PKG_PATH)$(TEST_PACKAGE)
 
 make-stage-dir: