lint: checkpatch: add typedefs_osmo.txt

Fix false error:
  ERROR:SPACING: need consistent spacing around '*' (ctx:WxV)

in a line with a typedef:
  int handle_rab_ass_req(..., ranap_message *message);

Change-Id: Icbc46d0c788ca75684a48a73f739265f4a09b09c

lint/checkpatch/checkpatch_osmo.sh

@@ -116,6 +116,7 @@ $SCRIPT_DIR/checkpatch.pl \
 	--ignore UNSPECIFIED_INT \
 	--ignore VOLATILE \
 	--max-line-length 120 \
+	--typedefsfile "$SCRIPT_DIR/typedefs_osmo.txt" \
 	--no-signoff \
 	--no-tree \
 	"$@"

lint/checkpatch/typedefs_osmo.txt

@@ -0,0 +1 @@
+ranap_message