Revert of Suppress MSI/MSM validation when building remoting MSI.

Revert of Suppress MSI/MSM validation when building remoting MSI. (patchset #1 id:1 of https://codereview.chromium.org/1020823003/)

Reason for revert:
This did the trick. Reverting this change and putting something durable in the signing infrastructure. Thanks.

Original issue's description:
> Suppress MSI/MSM validation when building remoting MSI.
>
> I believe this will unblock a required migration in our signing
> infrastructure.
>
> BUG=none
> R=garykac@chromium.org
>
> Committed: https://crrev.com/819da16a0d1246383bb8fe3c483fe7ace98a60b7
> Cr-Commit-Position: refs/heads/master@{#321438}

TBR=garykac@chromium.org,jamiewalch@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=none

Committed: https://crrev.com/d4d4a120cdc230d725c6c781ff9c1793231df639
Cr-Commit-Position: refs/heads/master@{#321596}

[grt (UTC plus 2), 2015-03-20 17:53:03]

Created Revert of Suppress MSI/MSM validation when building remoting MSI.

[commit-bot: I haz the power, 2015-03-20 17:53:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1028733002/1

[commit-bot: I haz the power, 2015-03-20 17:54:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-20 17:54:38]

Patchset 1 (id:??) landed as
https://crrev.com/d4d4a120cdc230d725c6c781ff9c1793231df639
Cr-Commit-Position: refs/heads/master@{#321596}