Be specific in the logging as multiple threads involved

Sure, each SAL_INFO output line includes the thread ID, but still,
good to avoid confusion from where this line is coming.

Change-Id: Idc531640e661ed363c7badbad8b83fbb43eaf3ad

sd/source/ui/remotecontrol/BluetoothServer.cxx

@@ -152,7 +152,7 @@ sal_Int32 OSXBluetoothWrapper::readLine( rtl::OString& aLine )
                         s << *p;
                 }
             }
-            SAL_INFO( "sdremote.bluetooth", "  mBuffer:  \"" << s.str() << "\"" );
+            SAL_INFO( "sdremote.bluetooth", "OSXBluetoothWrapper::readLine mBuffer:  \"" << s.str() << "\"" );
 #endif
 
             // got enough bytes to return a line?