gerrit.sh: Fix exit status codes to be LSB compliant

Fix exit status codes according to [1].

[1] http://refspecs.linux-foundation.org/LSB_3.2.0/LSB-Core-generic/LSB-Core-generic/iniscrptact.html

Change-Id: Ic26def7c815eba42aa6f1d2cf4578f224d57fa8d
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
1 file changed