devtool: upgrade: fix updating PV and SRCREV
This code was clearly never tested. Fix the following issues:
* Actually set SRCREV if it's been specified
* Enable history tracking and reparse so that we handle if variables are
set in an inc file next to the recipe
* Use a more accurate check for PV being in the recipe which will work
if it's in an inc file next to the recipe
(From OE-Core master rev:
8b8f04226ebf464fa61c05ca7af7c6cbda392339)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
