QtAV-1.12.0-bp150.1.3

- Update to 1.12.0
  * CMake support
  * Fix iOS build
  * Fix AVPacket memory leak
  * Geometry & GeometryRenderer class is public
  * PAL8, XYZ color format support
  * Fix OpenGL background color
  * Fix external clock error after pause
  * VA-API encoder support (ffmpeg>=3)
  * Other improvements, fixes, and untested features

- Description updates
- Rename %soname to %sover to better reflect its use
- Drop manual Requires that are unnecessary because autodetected

- Make sources available manually and remove the service in order
  to reduce build time dependencies on obs services for Backports

- initial package qt5 only for version 1.11.0
- based on packman 1.10.0 version from avvissu@yandex.ru
- disable CUDA support since it needs GPL incompatible headers