The PRINC logic is now deprecated, the PR server should be used to handle
the automatic incrementing of the PR (package release) field. Add a warning
message to alert users to the change. The functionality will be removed
in the next release cycle.
(From OE-Core rev: 6f8d01e0097ded355a1eb38724f11ee65401392e)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>