Fix build with Meson 0.50
commit ea49ba73:
meson: bump CONFIG_THIS_YEAR
commit 7e36a630:
meson: fix build with Meson 0.50
With Meson 0.50 option prefixes for languages are reserved,
so cuda_* options are no longer allowed. Rename our option
to ff_cuda_sdk then.
https://gitlab.freedesktop.org/gstreamer/gst-build/merge_requests/38