multilib.conf: Clean up file and add missing entries for various dependencies

This patch adds in various missing dependencies to ensure the set
of recipes listed for multilib support can be cleanly built.

(From OE-Core rev: 1d2697e6f00cc3771f39f5a7d4384a22d9696b16)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>