Add temporary output to debug landmines.

tools/run-tests.py

Index: tools/run-tests.py
diff --git a/tools/run-tests.py b/tools/run-tests.py
index 6e9f5549d811b44b488feb94c3d431ffdbac1825..b3fe9531ff11d218e9a6de1dc9f346e335ba2a5a 100755
--- a/tools/run-tests.py
+++ b/tools/run-tests.py
@@ -267,6 +267,13 @@ def ProcessOptions(options):
     # Buildbots run presubmit tests as a separate step.
     options.no_presubmit = True
     options.no_network = True
+
+    # FIXME(machenbach): Temporary hack to debug landmines on buildbot.
+    # Hardcoded for make/ninja.
+    src_dir = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
+    out_dir = os.path.join(src_dir, 'out', options.mode, '.landmines')
+    if os.path.exists(out_dir):
+      print "[INFO] Landmines tracker exists."
   if options.command_prefix:
     print("Specifying --command-prefix disables network distribution, "
           "running tests locally.")