tools: print stderr on bad test.py vmArch check

Fishrock123 · Myles Borins · commit 67720e899626 · 2016-07-12T10:59:51.000-07:00
This makes it so you can see why the check fails if it does. Typically that sort of thing can happen if you are modifying bootstrapping or `process`. PR-URL: #6786 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Anna Henningsen <anna@addaleax.net>
diff --git a/tools/test.py b/tools/test.py
@@ -1571,6 +1571,7 @@ def Main():
         vmArch = archEngineContext.stdout.rstrip()
         if archEngineContext.exit_code is not 0 or vmArch == "undefined":
           print "Can't determine the arch of: '%s'" % vm
+          print archEngineContext.stderr.rstrip()
           continue
         env = {
           'mode': mode,
