redhat: introduce RELEASE_LOCALVERSION variable
Sometimes we run into situation where people forget to set proper localversion during official builds and end up with .test in NVR.
Introduce a new variable to Makefile.variables, which will be persisted in source-git as well (contrast to localversion) and take priority when used for dist-rtg targets. The scenarios where we need custom localversion for official build should be very rare, meaning that the maintainer doesn't need to touch this variable and default (empty localversion) will be used instead of whatever may be left in 'localversion' (or DISTLOCALVERSION).
Signed-off-by: Jan Stancek jstancek@redhat.com