* projects/dav1d: remove unnecessarily installed packages
* projects/dav1d: fix build by just copying the fuzzing binaries
Meson switched the name of the directory holding the objects for the
fuzzer binaries to match the pattern used to copy all fuzzing binaries.
Copying the directory failed.
Meson requires a cross file for compiling i386 on x86_64. This
unfortunately needs to be generated on the fly to honor oss-fuzz'
compiler and compiler flags.
Supercedes #2823.
Fixes build failure caused by unavailable https://www.nasm.us/
The nasm version in ubuntu xenial is too old. The package from bionic
is new enough and usable without other dependencies from bionic.
Janne Grunau