srs_ue: send t+Enter to stdin after launching app

this enables the console trace which is printed to stdout
and provides human readable radio statistics

Change-Id: If1c998aff1c5c11d3fa636fb60cb4991e0def768
diff --git a/src/osmo_gsm_tester/srs_ue.py b/src/osmo_gsm_tester/srs_ue.py
index f725587..388fbf1 100644
--- a/src/osmo_gsm_tester/srs_ue.py
+++ b/src/osmo_gsm_tester/srs_ue.py
@@ -120,6 +120,10 @@
         else:
             self.start_remotely()
 
+        # send t+Enter to enable console trace
+        self.dbg('Enabling console trace')
+        self.process.stdin_write('t\n')
+
     def start_remotely(self):
         self.inst = util.Dir(os.path.abspath(self.suite_run.trial.get_inst('srslte')))
         lib = self.inst.child('lib')