[gm.py] Add support for building mkgrokdump

tools/dev/gm.py

 #!/usr/bin/env python
 # Copyright 2017 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 """\
 Convenience wrapper for compiling V8 with gn/ninja and running tests.
 Sets up build output directories if they don't exist.
 Produces simulator builds for non-Intel target architectures.
 Uses Goma by default if it is detected (at output directory setup time).
 Expects to be run from the root of a V8 checkout.
@@ skipping 19 matching lines @@
 # All arches that this script understands.
 ARCHES = ["ia32", "x64", "arm", "arm64", "mipsel", "mips64el", "ppc", "ppc64",
           "s390", "s390x", "x87"]
 # Arches that get built/run when you don't specify any.
 DEFAULT_ARCHES = ["ia32", "x64", "arm", "arm64"]
 # Modes that this script understands.
 MODES = ["release", "debug", "optdebug"]
 # Modes that get built/run when you don't specify any.
 DEFAULT_MODES = ["release", "debug"]
 # Build targets that can be manually specified.
-TARGETS = ["d8", "cctest", "unittests", "v8_fuzzers"]
+TARGETS = ["d8", "cctest", "unittests", "v8_fuzzers", "mkgrokdump"]
 # Build targets that get built when you don't specify any (and specified tests
 # don't imply any other targets).
 DEFAULT_TARGETS = ["d8"]
 # Tests that run-tests.py would run by default that can be run with
 # BUILD_TARGETS_TESTS.
 DEFAULT_TESTS = ["cctest", "debugger", "intl", "message", "mjsunit",
                  "preparser", "unittests"]
 # These can be suffixed to any <arch>.<mode> combo, or used standalone,
 # or used as global modifiers (affecting all <arch>.<mode> combos).
 ACTIONS = {
@@ skipping 253 matching lines @@
   if return_code == 0:
     _Call("notify-send 'Done!' 'V8 compilation finished successfully.'",
           silent=True)
   else:
     _Call("notify-send 'Error!' 'V8 compilation finished with errors.'",
           silent=True)
   return return_code
 
 if __name__ == "__main__":
   sys.exit(Main(sys.argv))