[sysadmin-bin] The || operator requires double enclosing parenthesis

[Andrea Veri <av src gnome org>]

commit af45fccca50826a3834d78578777a32a1ab5760a
Author: Andrea Veri <averi redhat com>
Date:   Fri Dec 15 15:10:05 2017 +0100

    The || operator requires double enclosing parenthesis

 git/pre-receive-check-policy |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/git/pre-receive-check-policy b/git/pre-receive-check-policy
index 4a26add..3f1982f 100755
--- a/git/pre-receive-check-policy
+++ b/git/pre-receive-check-policy
@@ -162,7 +162,7 @@ check_ref_update() {
                                 nonfastforward=true
                             fi
                         elif [ "`hostname`" == 'gitlab.gnome.org' ]; then
-                            if [ $is_master || $is_gnome ]; then
+                            if [[ $is_master || $is_gnome ]]; then
                                 nonfastforward=true
                             fi
                         fi