update all of osmocom to "latest" tags

We have to use some arcane construct to make the bitbake fetcher
actualyl fetch tags that are not on any branch (like those patch
releases that themselves branch off master, but which aren't on
master).  Otherwise we get errors like:

WARNING: osmo-sgsn-1.6.2+gitrAUTOINC+065500a347-r1.18.0 do_fetch: Failed to fetch URL git://git.osmocom.org/osmo-sgsn.git;protocol=git, attempting MIRRORS if available
ERROR: osmo-sgsn-1.6.2+gitrAUTOINC+065500a347-r1.18.0 do_fetch: Fetcher failure: Unable to find revision 065500a3471dd43b65dc87b95854c3015c551f0f in branch master even from upstream

Change-Id: I743173f8a3385686ffb11550aabc0fbc665cf043
diff --git a/recipes-osmocom/osmo-hlr/osmo-hlr_git.bb b/recipes-osmocom/osmo-hlr/osmo-hlr_git.bb
index 90bb611..0676f09 100644
--- a/recipes-osmocom/osmo-hlr/osmo-hlr_git.bb
+++ b/recipes-osmocom/osmo-hlr/osmo-hlr_git.bb
@@ -1,7 +1,7 @@
 require ${PN}.inc
 
 S = "${WORKDIR}/git"
-SRCREV = "3a66698d87b29e0bf8eb53ca29db7e0f02871abc"
-SRC_URI = "git://git.osmocom.org/osmo-hlr.git;protocol=git"
-PV = "1.2.0+gitr${SRCPV}"
+SRCREV = "1.2.1"
+SRC_URI = "git://git.osmocom.org/osmo-hlr.git;protocol=git;tag=${SRCREV};nobranch=1"
+PV = "1.2.1+gitr${SRCPV}"
 PR = "${INC_PR}.0"