Android: Exec "ant" without path
Android: Exec "ant" without path

When there is a whitespace in the patch to apache ant, such as in
C:\Program Files\... then building packages fails. Instead just
exec "ant" without path, to avoid this problem.

BUG=XWALK-5894

baleboy/crosswalk-app-tools,baleboy/crosswalk-app-tools,crosswalk-project/crosswalk-app-tools,crosswalk-project/crosswalk-app-tools,crosswalk-project/crosswalk-app-tools,baleboy/crosswalk-app-tools