Add missing quote

Change-Id: I7a6361007f3a4980511634ae29432f7caab3b349
diff --git a/src/com/mirantis/mk/Debian.groovy b/src/com/mirantis/mk/Debian.groovy
index 4e48ec7..134dc9e 100644
--- a/src/com/mirantis/mk/Debian.groovy
+++ b/src/com/mirantis/mk/Debian.groovy
@@ -133,7 +133,7 @@
                 sudo -H -u jenkins git add -u debian/changelog &&
                 sudo -H -u jenkins git commit -m "New snapshot version \$NEW_VERSION"
             ) &&
-            sudo -H -u jenkins gbp buildpackage -nc --git-force-create --git-notify=false --git-ignore-branch --git-ignore-new --git-verbose --git-export-dir=../build-area -S -uc -us""")
+            sudo -H -u jenkins gbp buildpackage -nc --git-force-create --git-notify=false --git-ignore-branch --git-ignore-new --git-verbose --git-export-dir=../build-area -S -uc -us'""")
 }
 
 /*