If you don't want to remove the arch checks this works:
if 'aarch64' in arch: command += ['--ex', 'set architecture aarch64', '--ex', 'set gnutarget elf64-littleaarch64'] elif 'ppc64le' in arch: command += ['--ex', 'set architecture powerpc:common64', '--ex', 'set gnutarget elf64-powerpcle']
If you don't want to remove the arch checks this works:
if 'aarch64' in arch:
command += ['--ex', 'set architecture aarch64', '--ex', 'set gnutarget elf64-littleaar ch64']
command += ['--ex', 'set architecture powerpc:common64', '--ex', 'set gnutarget elf64-powerpcle']
elif 'ppc64le' in arch: