Added msvs_enable_winrt to enable creating Windows Store compatible projects for .dlls that are con…

Added msvs_enable_winrt to enable creating Windows Store compatible projects for .dlls that are consumed by WinRT applications.

Patch from coopp@microsoft.com.

BUG=
R=scottmg@chromium.org

Committed: https://code.google.com/p/gyp/source/detail?r=1985

[coop, 2014-09-25 15:39:08]

coopp@microsoft.com changed reviewers:
+ scottmg@chromium.org

[coop, 2014-09-25 15:39:08]

I updated the test to have a proper check that prevents it from being run on non
VS2013 configurations.  If the test system properly sets the GYP_MSVS_VERSION
environment variable then we are good to go.  I tested this manually on my
system and the test is skipped if this value is set to an older VS version.

[scottmg, 2014-09-25 16:19:06]

I think we'll need the '3': 'ARM' thing bit in msvs_emulation, right?

(Something seems to have been locked down so I can't start tryjobs on this CL
(maybe because it's not mine?), but I reuploaded it and ran them here, so we'll
see in a bit https://codereview.chromium.org/609473002 )

[coop, 2014-09-25 16:22:51]

On 2014/09/25 16:19:06, scottmg wrote:
> I think we'll need the '3': 'ARM' thing bit in msvs_emulation, right?
> 
> (Something seems to have been locked down so I can't start tryjobs on this CL
> (maybe because it's not mine?), but I reuploaded it and ran them here, so
we'll
> see in a bit https://codereview.chromium.org/609473002 )

I can add that back to this change for completeness.

[coop, 2014-09-25 16:31:07]

On 2014/09/25 16:22:51, coop wrote:
> On 2014/09/25 16:19:06, scottmg wrote:
> > I think we'll need the '3': 'ARM' thing bit in msvs_emulation, right?
> > 
> > (Something seems to have been locked down so I can't start tryjobs on this
CL
> > (maybe because it's not mine?), but I reuploaded it and ran them here, so
> we'll
> > see in a bit https://codereview.chromium.org/609473002 )
> 
> I can add that back to this change for completeness.

The TargetMachine map should now contain the proper '3' : 'ARM' value.

[scottmg, 2014-09-25 16:46:31]

lgtm

[scottmg, 2014-09-25 16:48:21]

Committed patchset #2 (id:20001) manually as 1985 (presubmit successful).

[scottmg, 2014-09-25 16:48:33]

(i tweaked the formatting below on landing)

https://codereview.chromium.org/607553002/diff/20001/pylib/gyp/msvs_emulation.py
File pylib/gyp/msvs_emulation.py (right):

https://codereview.chromium.org/607553002/diff/20001/pylib/gyp/msvs_emulation...
pylib/gyp/msvs_emulation.py:482: prefix='/MACHINE:')
nit; align to (

https://codereview.chromium.org/607553002/diff/20001/test/win/enable-winrt/en...
File test/win/enable-winrt/enable-winrt.gyp (right):

https://codereview.chromium.org/607553002/diff/20001/test/win/enable-winrt/en...
test/win/enable-winrt/enable-winrt.gyp:30: 'msvs_settings':
nit; 2s and [ and { on previous line