ninja win: Add support for 'CallingConvention'

ninja win: Add support for 'CallingConvention'

Each calling convention decorates C functions in a different way, so we can use
that to test the flag.

BUG=
R=scottmg@chromium.org

Committed: https://code.google.com/p/gyp/source/detail?r=1984

[Shezan Baig (Bloomberg), 2014-09-24 15:42:13]

sbaig1@bloomberg.net changed reviewers:
+ scottmg@chromium.org

[scottmg, 2014-09-24 15:55:29]

Nice test! LGTM.

[Shezan Baig (Bloomberg), 2014-09-24 16:02:49]

On 2014/09/24 15:55:29, scottmg wrote:
> Nice test! LGTM.

Thanks :)

Is it still 'git cl dcommit' to land in gyp, or 'git cl land'?

[Shezan Baig (Bloomberg), 2014-09-24 17:05:02]

The gyp-win32 failure (gyptest-link-target-machine) seems to be caused by r1981

[Shezan Baig (Bloomberg), 2014-09-24 21:47:38]

PTAL -- I removed the /Gv support.  This flag is only available in MSVC2013, so
it was failing on gyp-win64, which uses older versions of msvs.

[scottmg, 2014-09-24 21:51:15]

On 2014/09/24 21:47:38, Shezan Baig (Bloomberg) wrote:
> PTAL -- I removed the /Gv support.  This flag is only available in MSVC2013,
so
> it was failing on gyp-win64, which uses older versions of msvs.

OK, LGTM. We really need to get that bot updated.

[Shezan Baig (Bloomberg), 2014-09-24 21:53:47]

Committed patchset #4 (id:60001) manually as 1984 (presubmit successful).