[NaCl SDK] Disable nacl_io_test on pnacl/Release win+linux

Loading and translating the pexe takes > 40sec, which causes the test to fail.

BUG=315253
R=sbc@chromium.org

Review URL: https://codereview.chromium.org/60563004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233105 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233105
Revert 233046 "Remove RGB32 from VideoFrame::Format."
(Reverting as it seem to break ChromeOS, please re-land as soon as fixed.)

> Remove RGB32 from VideoFrame::Format.
> 
> It wasn't used anywhere outside of the unit tests.
> 
> BUG=313827
> TBR=danakj
> 
> Review URL: https://codereview.chromium.org/56713002

TBR=rileya@chromium.org

Review URL: https://codereview.chromium.org/60393004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233106 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233106