Imported Upstream version 5.18.0.161

Former-commit-id: 4db48158d3a35497b8f118ab21b5f08ac3d86d98

external/llvm/utils/git-svn/git-svnup

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+if [ -n "`git status -uno -s --porcelain`" ]; then
+    echo "You have unstashed changes. Can not update repository..."
+    git status -uno
+    exit 1
+fi
+
+git fetch
+OLD_BRANCH=$(git rev-parse --abbrev-ref HEAD)
+git checkout master 2> /dev/null
+git svn rebase -l
+git checkout $OLD_BRANCH 2> /dev/null
+
+exit 0