Bug 862900 - remount system partition when doing |make reset-gaia|, r=@…

…ochameau, a=NPTOB

Makefile

@@ -703,13 +703,14 @@ reset-gaia: purge install-gaia install-settings-defaults
 # remove the memories and apps on the phone
 purge:
 	$(ADB) shell stop b2g
-	(for FILE in `$(ADB) shell ls $(MSYS_FIX)/data/local | tr -d '\r'`; \
+	@(for FILE in `$(ADB) shell ls $(MSYS_FIX)/data/local | tr -d '\r'`; \
 	do \
 		[ $$FILE = 'tmp' ] || $(ADB) shell rm -r $(MSYS_FIX)/data/local/$$FILE; \
 	done);
 	$(ADB) shell rm -r $(MSYS_FIX)/cache/*
 	$(ADB) shell rm -r $(MSYS_FIX)/data/b2g/*
 	$(ADB) shell rm -r $(MSYS_FIX)/data/local/webapps
+	$(ADB) remount
 	$(ADB) shell rm -r $(MSYS_FIX)/system/b2g/webapps
 
 # Build the settings.json file from settings.py