tools/create-image.sh: map qemu -> Debian architecture names
tools/create-image.sh: map qemu -> Debian architecture names

create-image.sh assumes that the qemu name and the Debian name for the
target architecture are the same. This is not always true.

For comedy and/or historical reasons, Debian refers to 64-bit little
endian PowerPC as ppc64el, whereas qemu and most other things use ppc64le.
Debian refers to aarch64 as arm64, and 32-bit little endian arm as armel.
Add special cases to handle this.

Signed-off-by: Andrew Donnellan <44ca8c041ed925606732b2a0f30e5b73c32761a8@linux.ibm.com>

google/syzkaller,xairy/syzkaller,google/syzkaller,google/syzkaller,xairy/syzkaller,xairy/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller