basically a follow-up to #1031946 - there are at least two more rustc
test cases that fail with gdb 13.1 (but used to work with gdb 12.1),
this time only affecting mipsel.

I extracted the test cases in the existing reproducer repository[0], you
will need a mipsel machine (/VM) with rustc and cargo installed (I used
1.63 from bookworm).

I'll work around the issue for now by allowing rustc to build in
experimental even with these test cases failing, but a rebuild of rustc
on mipsel in bookworm would (likely) fail until this is fixed properly.

0: https://salsa.debian.org/fg/rustc-gdb-1031745/-/blob/main/README-mips.md
1: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1031946