clamav: Update to 0.104.0

clamav: Update to 0.104.0

For details see:
https://blog.clamav.net/2021/09/clamav-01040-released.html

New requirements and major changes:
"As of ClamAV 0.104, CMake is required to build ClamAV
...
The built-in LLVM for the bytecode runtime has been removed."

But since the current 'llvm 12.0.1' version refused to be build
"...you will need to supply the development libraries for LLVM
version 3.6.2" - which is ~6 years old - I gave up with 'llvm'
and stayed with the bytecode "interpreter".

Cited:
"The bytecode interpreter is the default runtime for bytecode
signatures just as it was in ClamAV 0.103.

@ALL:
In 'clamav 0.104.0' there is no appropriate cmake option for
"CONFIGURE_FLAGS = --disable-fanotify" for ARM buildings anymore.
Perhaps there is a kernel option for this?
=> https://docs.clamav.net/manual/OnAccess.html#requirements

Signed-off-by: Matthias Fischer <matthias.fischer@ipfire.org>
Reviewed-by: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>