conf/bitbake.conf: Added variables for PR service.
Added following variables for PR service:
USE_PR_SERV: flag of whether to use the network PR service
PRAUTOINX: search index for the network PR service
PKGE/PKGV/PKGR: epoch, version and revision used in package feed.
EXTENDPKGV: full package version string used in package relationships.
For the following recipes, replace EXTENDPV with EXTENDPKGV:
udev, xcb, xorg-proto, util-macros and linux-libc-headers
then removed the unused EXTENDPV and EXTENDPEVER variables
Users should use EXTENDPKGV instead for package feed generation.
Signed-off-by: Lianhao Lu <lianhao.lu@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
