Concatenate and minify all javascript files in the release build but not
in the debug build. Also, it is enabled to use a build directory
Change-Id: Ia120447a827cfe236241ddf188bf43a088f877a7
Reviewed-on: https://gerrit.libreoffice.org/52802
Reviewed-by: pranavk <pranavk@collabora.co.uk>
Tested-by: pranavk <pranavk@collabora.co.uk>
