[test] Temporarily print errors when fetching process list

Bug: v8:13101
Change-Id: I1fbcfd5758e3fb739b79c7d381e62b380cd14a2c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3784227Reviewed-by: Liviu Rau <liviurau@chromium.org>
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Liviu Rau <liviurau@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81935}

tools/testrunner/testproc/util.py

@@ -29,7 +29,10 @@ def list_processes_linux():
     ]
     # Filter strange process with name as out dir.
     return [p for p in processes if p[1] != OUT_DIR]
-  except:
+  except Exception as e:
+    # TODO(https://crbug.com/v8/13101): Remove after investigation.
+    print('Fetching process list failed.')
+    print(e)
     return []