I made a little change in the UNINSTALL_SCRIPT for gnome
as it wasn't working for local installation (targeting build-global folders only)
In order to achieve functionality of the script I had to completelly
delete the build-* folders in each lrc and client-gnome, for making
it generic in local and global mode.

Change-Id: I51d8a9e75de0c90c398533663c70940f92f8cd67
Reviewed-by: Guillaume Roguez <guillaume.roguez@savoirfairelinux.com>