Make format torque tools work on win

Reformatting Torque file is required to upload a CL
but it can only work on POSIX

Change-Id: I51283e3f6b29abf492be7efb5b8f10454d09fb37
Reviewed-on: https://chromium-review.googlesource.com/c/1475919Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59719}

tools/torque/format-torque.py

@@ -95,7 +95,7 @@ def process(filename, lint, should_format):
 
   original_input = content
 
-  p = Popen(['clang-format', '-assume-filename=.ts'], stdin=PIPE, stdout=PIPE, stderr=PIPE)
+  p = Popen(['clang-format', '-assume-filename=.ts'], stdin=PIPE, stdout=PIPE, stderr=PIPE, shell=True)
   output, err = p.communicate(preprocess(content))
   output = postprocess(output)
   rc = p.returncode