msdk: adjust the stride align

GstAllocationParams::align is set to 31 in msdkdec/msdken/msdkvpp, hence
the stride align should be greater than or equal to 31, otherwise it
will result in issue
(msdk: "GStreamer-CRITICAL: gst_buffer_resize_range failed" SPAM),

In addition, the stride should match the pitch alignment in the media driver,
otherwise it will result in some issues when a buffer is shared between
different elements, e.g. the NV12 issue mentioned in commit 3f2314a1, which
can be reproduced by `gst-launch-1.0 vidoetestsrc ! msdkvpp !
video/x-raw\(memory:DMABuf\),format=NV12 ! glimagesink`

Fixed gstreamer/gst-plugins-bad#861
22 jobs for msdk-fix-stride in 33 minutes and 44 seconds (queued for 3 seconds)