NASM-3.00 causes build failures, recommend downgrading

Hello everyone.

We have a problem with NASM-3.00. It is currently in the development
books of BLFS. 3.00 made changes that affects packages like dav1d and
libaom. I haven't tried packages besides those, but the scope may be
bigger, I don't know quite yet.

For dav1d, the assembly files have operands in an order that NASM-3.00
forced to be the other way according to the specification. This causes
dav1d to fail to build from source.

In libaom's case, it fails to even configure via CMake as the NASM is
unsupported. This is because the build system uses NASM's help output,
in which it was changed. It expects all the supported options and build
targets to be shown with the current options -hf. The problem is now
the options it wants to see plus the build targets have been split up.
Now, it would want -h0 plus -hf, which cannot be ran in the same
command.

Lack of energy and time, I see it as a good idea to simply downgrade
NASM to 2.x.x until these issues in other packages have been fixed.

Apologies to anyone who installed NASM-3.00 as a result of it being in
the development books. I heavily recommend to downgrade to NASM-2.16.03
to prevent build failures.

- Zeckma

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