Update git tag patterns for rtl-sdr, osmo-fl2k

With the v2.0.0 release of rtl-sdr, it was decided to include the v in
the tag pattern again, so adjust it in the related scripts. Adjust
osmo-fl2k too in the OBS scripts because there the tag pattern was not
set.

Change-Id: If1bb64722bd24b0079d2427ea3b0f5b5c87ef7ac
2 files changed