Hyunjun Ko authored Mar 30, 2018 and Sreerenj Balachandran committed Mar 30, 2018

This patch includes:
1\ Implements MsdkDmaBufAllocator and allocation of msdk dmabuf memroy.
2\ Each msdk dmabuf memory include its own msdk surface kept by GQuark.
3\ Adds new option GST_BUFFER_POOL_OPTION_MSDK_USE_DMABUF

https://bugzilla.gnome.org/show_bug.cgi?id=793707