Make text selection feature available on desktop builds.

Make text selection feature available on desktop builds.

In GBS builds, we pass edje_dir value used to specify EDJ
resources' location as a GYP parameter (see -Dedje_dir in
chromium-efl.spec, for instance).

In order to have text selection on desktop builds, patch
does the same from build/common.sh.
Also, it makes GBS and desktop builds to take the same
codepath when resolving the respective edj path, eliminating
Reviewed by: Janusz Majnert, SeungSeop Park

Change-Id: Ia00bef1690f97ea77ff763718e6b36b6534fd9d0
Signed-off-by: Antonio Gomes <a1.gomes@samsung.com>