ms: update osmocom-bb submodule

Change-Id: I0140f0a5333469f356c85a95660e10bbdd67cd25
diff --git a/osmocom-bb b/osmocom-bb
index a41ca4b..f12b17d 160000
--- a/osmocom-bb
+++ b/osmocom-bb
@@ -1 +1 @@
-Subproject commit a41ca4bbc42bc66557cdc7c646c539d1a4c1e30f
+Subproject commit f12b17dffb782c7428a563620aa83ec047fd99c4