kernel.bbclass: Add support for perf-dbg package

The perf component is built with the kernel, so ensure that it gets the
debug information associated with it.

Also bump the PR in the linux-yocto-* to ensure they get rebuilt.

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>