msvs: Revert r1920 and add a test for excluded idl

msvs: Revert r1920 and add a test for excluded idl

The test uses a "bad" idl to verify that it gets excluded from the msvs build.
If it doesn't get excluded, then the build will fail because the bad.idl is
syntactically wrong.

BUG=
R=scottmg@chromium.org

Committed: https://code.google.com/p/gyp/source/detail?r=1925

[Shezan Baig (Bloomberg), 2014-05-29 15:47:06]

This is to fix a regression from r1920 (see discussion at
https://codereview.chromium.org/282843002/)

[scottmg, 2014-05-29 15:56:44]

Thanks, lgtm.

[Shezan Baig (Bloomberg), 2014-05-29 19:15:42]

Committed patchset #1 manually as r1925 (presubmit successful).

[Romain Pokrzywka, 2014-05-31 00:23:12]

On 2014/05/29 19:15:42, Shezan Baig (Bloomberg) wrote:
> Committed patchset #1 manually as r1925 (presubmit successful).

Thanks!
Romain