Add a script to run clang-format on all source files

tools/run-clang-format.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+set -e
+source $(dirname $0)/env.sh
+
+cd $LUNA_ROOT
+
+SOURCES=($(find kernel/src -type f | grep "\.c") $(find kernel/include -type f))
+SOURCES+=($(find libs/libc/src -type f | grep "\.c") $(find libs/libc/include -type f))
+SOURCES+=($(find apps/src -type f))
+
+for f in ${SOURCES[@]}
+do
+    clang-format $f -i
+done