[infra] Begin removing gyp

runtime/tools/gyp/find_mac_gcc_version.py

-#!/usr/bin/env python
-# Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-# for details. All rights reserved. Use of this source code is governed by a
-# BSD-style license that can be found in the LICENSE file.
-
-import re
-import subprocess
-import sys
-
-def main():
-  job = subprocess.Popen(['xcodebuild', '-version'],
-                         stdout=subprocess.PIPE,
-                         stderr=subprocess.STDOUT)
-  stdout, stderr = job.communicate()
-  if job.returncode != 0:
-    print >>sys.stderr, stdout
-    print >>sys.stderr, stderr
-    raise Exception('Error %d running xcodebuild!' % job.returncode)
-  matches = re.findall('^Xcode (\d+)\.(\d+)(\.(\d+))?$', stdout, re.MULTILINE)
-  if len(matches) > 0:
-    major = int(matches[0][0])
-    minor = int(matches[0][1])
-
-    if major >= 4:
-      return 'com.apple.compilers.llvmgcc42'
-    elif major == 3 and minor >= 1:
-      return '4.2'
-    else:
-      raise Exception('Unknown XCode Version "%s"' % version_match)
-  else:
-    raise Exception('Could not parse output of xcodebuild "%s"' % stdout)
-
-if __name__ == '__main__':
-  if sys.platform != 'darwin':
-    raise Exception("This script only runs on Mac")
-  print main()