Log Message:
libva: update to 2.21.0.

version 2.21.0 - 12.Mar.2024
* va: Add allow_content_tools and force_intger_mv to AV1 enc
* va: add VASurfaceAttribAlignmentSize
* va: Re-add drm_state and fd checks to VA_DRM_GetDriverNames
* va: export symbol vaGetLibFunc for Windows
* va: Add PRIME3 defination and correct the value
* va: add driver name map for new intel KMD xe
* va: export symbol vaMapBuffer2 for Windows
* va: add new interface vaMapBuffer2 for map operation optimization
* va: Add VAConfigAttribEncMaxTileRows and VAConfigAttribEncMaxTileCols
* va: fix handling when all wayland backends fail
* va_trace:add return value trace for vaPutSurfaces
* ci: harden permissions for all github workflows
* ci: update to vmactions/freebsd-vm from v0 to v1
* ci: windows.yml: Add windows-msvc-debug
* meson: create dist archives suitable for building with configure, too
* autogen.sh: successfully detect if the autoreconf program is installed
* build(deps): bump actions/upload-pages-artifact from 2 to 3
* build(deps): bump actions/deploy-pages from 3 to 4
* build(deps): bump actions/setup-python from 4 to 5
* build(deps): bump actions/deploy-pages from 2 to 3
* win32: Fix debug build break