osmo-mobile.cfg.tmpl: Improve logging

Change-Id: I5fc07bd9332f6adac67b108f712fb99ee7cb3439
diff --git a/src/osmo_gsm_tester/templates/osmo-mobile.cfg.tmpl b/src/osmo_gsm_tester/templates/osmo-mobile.cfg.tmpl
index 0a2cd6d..b2dc141 100644
--- a/src/osmo_gsm_tester/templates/osmo-mobile.cfg.tmpl
+++ b/src/osmo_gsm_tester/templates/osmo-mobile.cfg.tmpl
@@ -1,3 +1,12 @@
+log stderr
+ logging filter all 1
+ logging color 1
+ logging print category 1
+ logging print category-hex 0
+ logging print level 1
+ logging print file basename last
+ logging print extended-timestamp 1
+ logging level set-all notice
 line vty
  bind 127.0.0.1 0
 no gps enable