clang.bbclass: Be mindful of multilibs when adding tools dependencies
clang.bbclass: Be mindful of multilibs when adding tools dependencies

This ensures that multilib prefix is respected in dependencies and can
be handled when distro enables multilib

Signed-off-by: Khem Raj <729d64b6f67515e258459a5f6d20ec88b2caf8df@gmail.com>

kraj/meta-clang,kraj/meta-clang,kraj/meta-clang