Add verification scripts for clang-format

The scripts are very light on error handling and verification, mostly
intended just to debug if a CI server fails on formatting reasons.

build_scripts/linux/verify_formatting

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+clang-format --version;
+
+if [ $? -eq 0 ]; then
+    echo "Clang-format found."
+    build_path="`dirname \"$0\"`"
+    project_path=$build_path/../..
+
+    python $project_path/build_scripts/run-clang-format.py $project_path/src -r --color always;
+    echo "FORMATTED CORRECTLY."
+else
+    echo "Could not find clang-format."
+fi
+