Matrices in blocks require MatrixStride and one of ColMajor or RowMajor
decorations.

Bug: angleproject:4889
Change-Id: I14ddb32fd3dbc977bf41703b016dc6d1c0722475
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2930368
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Tim Van Patten <timvp@google.com>