Add storage buffer memory qualifier and run time array stride information
to QShaderDescription::StorageBlock.
Memory qualifiers allow more informed selection of RHI resource buffer
binding (bufferLoad / bufferStore / bufferLoadStore) function.
Run time array stride (for last block member unsized array) allows
packing of buffer data for transfer to / from GPU. Without this
information, applications must infer or guess which packing rules
(std430 / std140) are in use.
Change-Id: I676d7e848afefd40d01cdd463c569b07022b683e
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
0943b5d65d