autoninja: skip RBE wrapper for -t tool invocations

ninja tools don't need an RBE environment active, so avoid an
unnecessary delay and noisy output when something like autoninja -t
commands is invoked.

Change-Id: I28fe5275a4a130251d5c0feac5841ba2c410527d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/5987270
Reviewed-by: Fumitoshi Ukai <ukai@google.com>
Commit-Queue: Fumitoshi Ukai <ukai@google.com>

autoninja.py

@@ -372,7 +372,7 @@ def _main_inner(input_args, build_id, should_collect_logs=False):
         # are being used.
         _print_cmd(ninja_args)
 
-    if use_reclient:
+    if use_reclient and not t_specified:
         return reclient_helper.run_ninja(ninja_args, should_collect_logs)
     return ninja.main(ninja_args)