fix CLEAN_PRJ variable to same name (remove CLEANPRJ)
protect variables and paths with quotes

Change-Id: Ic15f14bc2800b4d812002f24afa677a5eaa4a2cc
Signed-off-by: Philippe Coval <philippe.coval@open.eurogiciel.org>
Merge pull request #1 from rzr/master

fix CLEAN_PRJ variable to same name (remove CLEANPRJ)