[llvm] [CodeGen][Mips] Explicit ELF output file format for MIPS tests (PR #114678)

[Hervé Poussineau via llvm-commits]

hpoussin wrote:

Ping.
I don't think the timeout failure of test "tools/lldb-dap/evaluate/TestDAP_evaluate.py" on Linux buildbot is due to my commit.

https://github.com/llvm/llvm-project/pull/114678