CommandParser: Handle absolute paths for update() command
CommandParser: Handle absolute paths for update() command

BUG=XWALK-4713 (reopened)

pozdnyakov/crosswalk-app-tools,baleboy/crosswalk-app-tools,crosswalk-project/crosswalk-app-tools,crosswalk-project/crosswalk-app-tools,crosswalk-project/crosswalk-app-tools,hgl888/crosswalk-app-tools,shawngao5/crosswalk-app-tools,baleboy/crosswalk-app-tools,davidmaxwaterman/crosswalk-app-tools,pozdnyakov/crosswalk-app-tools,shawngao5/crosswalk-app-tools,hgl888/crosswalk-app-tools,davidmaxwaterman/crosswalk-app-tools,baleboy/crosswalk-app-tools