Add forgotten file before-submit.sh

Author: hzeller

scripts/before-submit.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+#
+# Good to run before each submit to catch or repair issues.
+
+cd $(dirname $0)/..
+
+set -e
+
+. <(scripts/run-build-cleaner.sh ...)  # auto-repair issues
+scripts/run-clang-format.sh
+bazel test -c opt ...
+scripts/make-compilation-db.sh
+sh scripts/run-clang-tidy-cached.cc