Revised CL for customisable logging (replacing printfs).

runtime/bin/dbg_connection_linux.cc

Index: runtime/bin/dbg_connection_linux.cc
===================================================================
--- runtime/bin/dbg_connection_linux.cc	(revision 14903)
+++ runtime/bin/dbg_connection_linux.cc	(working copy)
@@ -9,6 +9,7 @@
 
 #include "bin/dbg_connection.h"
 #include "bin/fdutils.h"
+#include "bin/log.h"
 #include "bin/socket.h"
 
 int DebuggerConnectionImpl::epoll_fd_ = -1;
@@ -32,7 +33,7 @@
     // Sync message. Not yet implemented.
     UNIMPLEMENTED();
   } else {
-    printf("unexpected: receiving debugger connection event.\n");
+    Log::Print("unexpected: receiving debugger connection event.\n");
     UNIMPLEMENTED();
   }
 }