Building eudev from scratch in an sstate build results in configure errors
since the pkg-config macros can't be found. Add in a missing pkg-config
dependency using the appropriate class to avoid such failures.
(From OE-Core rev: 6b527bbfea5088c20da98cd72abe5caa4b399787)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>