bts/osmo-{bsc,bts}.cfg: tune logging configuration

Change-Id: I0360fa1db2137bf8e68ba87403742e0e8c9c1147
diff --git a/bts/osmo-bts.cfg b/bts/osmo-bts.cfg
index 4629180..5609212 100644
--- a/bts/osmo-bts.cfg
+++ b/bts/osmo-bts.cfg
@@ -8,10 +8,14 @@
 !
 log stderr
  logging filter all 1
- logging color 1
- logging print category 1
- logging timestamp 1
  logging print extended-timestamp 1
+ logging print file basename last
+ logging print category-hex 0
+ logging print category 1
+ logging print level 1
+ logging timestamp 1
+ logging color 1
+!
  logging level set-all notice
  logging level rsl info
  logging level oml info