libosmocore/libosmo-abis: Update libosmo-abis to an experimental branch

Update libosmocore to 0.6.2+git and the libosmo-abis to a branch
useful for the osmo-bts.
diff --git a/recipes-osmocom/libosmocore/libosmocore_git.bb b/recipes-osmocom/libosmocore/libosmocore_git.bb
index f35cf4f..68c64bd 100644
--- a/recipes-osmocom/libosmocore/libosmocore_git.bb
+++ b/recipes-osmocom/libosmocore/libosmocore_git.bb
@@ -1,7 +1,7 @@
 require ${PN}.inc
 
 S = "${WORKDIR}/git"
-SRCREV = "1a02cfc24d2c812ba13e5aa936588be447bb24af"
+SRCREV = "a652abc5bf75435ba7f1c96ed914cf5805fc326f"
 SRC_URI = "git://git.osmocom.org/libosmocore.git;protocol=git"
-PV = "0.6.0+gitr${SRCPV}"
+PV = "0.6.2+gitr${SRCPV}"
 PR = "2"