Add new aamvf_path variable in ubuntu_vars.sh file

[ikitayama]

Ubuntu's arm64 port, at least 24.10, packages EFI binaries the /usr/share/AAVMF directory. Add a new variable, aavmf_path in ubuntu_vars.sh, depending on the arch, run_qemu.sh can pick up the appropriate "path" to the EFI binaries.

[stellarhopper]

FWIW, Fedora has:

$ ls -l /usr/share/AAVMF
total 12
lrwxrwxrwx. 1 root root 42 Nov 26 17:00 AAVMF_CODE.fd -> ../edk2/aarch64/QEMU_EFI-silent-pflash.raw
lrwxrwxrwx. 1 root root 35 Nov 26 17:00 AAVMF_CODE.verbose.fd -> ../edk2/aarch64/QEMU_EFI-pflash.raw
lrwxrwxrwx. 1 root root 40 Nov 26 17:00 AAVMF_VARS.fd -> ../edk2/aarch64/vars-template-pflash.raw

$ ls -l /usr/share/edk2/aarch64/
total 208444
-rw-r--r--. 1 root root  2097152 Nov 26 17:00 QEMU_EFI.fd
-rw-r--r--. 1 root root  2097152 Nov 26 17:00 QEMU_EFI.kernel.fd
-rw-r--r--. 1 root root  2117632 Nov 26 17:00 QEMU_EFI-pflash.qcow2
-rw-r--r--. 1 root root 67108864 Nov 26 17:00 QEMU_EFI-pflash.raw
-rw-r--r--. 1 root root  2097152 Nov 26 17:00 QEMU_EFI.silent.fd
-rw-r--r--. 1 root root  2117632 Nov 26 17:00 QEMU_EFI-silent-pflash.qcow2
-rw-r--r--. 1 root root 67108864 Nov 26 17:00 QEMU_EFI-silent-pflash.raw
-rw-r--r--. 1 root root   786432 Nov 26 17:00 QEMU_VARS.fd
-rw-r--r--. 1 root root   806912 Nov 26 17:00 vars-template-pflash.qcow2
-rw-r--r--. 1 root root 67108864 Nov 26 17:00 vars-template-pflash.raw

We should probably update the _vars files for all distros, so that the script has a reasonable chance of working everywhere once the new arm option is implemented and added.

[ikitayama]

Could this be pulled, as this does not affect Intel badly, it's an addition of a new variable.

[marc-hb]

I know I asked for smaller PRs in #140 but this might be taking it a bit "too far". I think it's better to add such variables and one-liners in the same PR where they are actually used.

Moreover, let's finalize the "arch-framework" in #143 first.

[ikitayama]

Okay.

[marc-hb]

Superseded by #164, thank you for testing the latter.