Add a perf.inc to contain utility functions and definitions and to
avoid cluttering up the main recipe.
(From OE-Core rev: 414d00be5b350ea84fc7e1ff690f78b3396cfcd0)
Signed-off-by: Tom Zanussi <tom.zanussi@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>