Bug 501457, OSX type/creator ID is incorrect because echo -n is not portable, r=ted.mielczarek

browser/app/Makefile.in

@@ -403,7 +403,7 @@ endif
 	-cp -L $(DIST)/bin/mangle $(DIST)/bin/shlibsign $(DIST)/$(APP_NAME).app/Contents/$(APPFILES)
 	cp -RL $(DIST)/branding/firefox.icns $(DIST)/$(APP_NAME).app/Contents/Resources/firefox.icns
 	cp -RL $(DIST)/branding/document.icns $(DIST)/$(APP_NAME).app/Contents/Resources/document.icns
-	echo -n APPLMOZB > $(DIST)/$(APP_NAME).app/Contents/PkgInfo
+	printf APPLMOZB > $(DIST)/$(APP_NAME).app/Contents/PkgInfo
 #       remove CVS dirs from packaged app
 	find $(DIST)/$(APP_NAME).app -type d -name "CVS" -prune -exec rm -rf {} \;