MatrixStride Decorations Missing

[cwfitzgerald]

Starting in SDK 1.3.290, we get the following error from spirv-val:

[ERROR xtask::validate] Failed to validate "tests\\out\\spv\\globals.spvasm".
Note: Labels and line numbers will not match the input file.
      Use this command to view the corresponding spvasm:
      'spirv-as --target-env spv1.1 tests\out\spv\globals.spvasm -o - | spirv-dis'
: `spirv-val` failed to run; exit code: Some(1)
stdout:

stderr:
error: line 91: Structure id 23 decorated as Block must be explicitly laid out with MatrixStride decorations.
  %_struct_23 = OpTypeStruct %_arr__arr_mat2v4float_uint_2_uint_2


[ERROR xtask] failed to validate one or more files, see above output for more details

Found in #6306