gerrit-release.sh: Do not include any suffixes when uploading docs

Gerrit RCs do not contain the -rcN suffix in the documentation folder.
Strip out the suffix before uploading the documentation set.

Change-Id: I17074e36d12612ee5d36c7ee12c0542d579e04df
diff --git a/jenkins-docker/slave-release/gerrit-release.sh b/jenkins-docker/slave-release/gerrit-release.sh
index e04f727..5d85116 100755
--- a/jenkins-docker/slave-release/gerrit-release.sh
+++ b/jenkins-docker/slave-release/gerrit-release.sh
@@ -87,7 +87,8 @@
 echo "Pushing gerrit documentation to gerrit-documentation ..."
 unzip searchfree.zip
 pushd Documentation
-gsutil cp -r . gs://gerrit-documentation/Documentation/$version
+version_no_rc=$(echo "%version" | cut -d '-' -f 1)
+gsutil cp -r . gs://gerrit-documentation/Documentation/$version_no_rc
 popd
 
 echo "Setting next version tag to $nextversion ..."