[scripts] Updating clang-tidy script with new prebuilt path Change-Id: Iaeb6ed5f54eba04af8eab2fea9b303336b77cae4
[scripts] Updating messages to specify use of USE_CLANG flag Change-Id: Iadd06e91f98a3228ce870d21e6441670ef15d8df
[scripts] Creating clang-tidy script for Zircon Change-Id: I74a85909621548b1fbbd39c67be6675f3c811275