bitbake: toaster: select recipe based on PN name

bitbake: toaster: select recipe based on PN name

When saving task stats, if there were multiple tasks executed
based on the same recipe file, we might have saved the stats
to the wrong task by selecting another recipe.

This patch takes the PN into account to properly select
the file stats.

A check is also made to make sure we don't fail saving
data due to interrupted builds.

(Bitbake rev: e855031410daf2b99a6ca40b70956fe67c96f71c)

Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>