Add additional PPC toolchain test

[rbs-jacob]

As per this comment by @andresito00 on the PPC toolchain PR, this issue documents the need to translate the remaining patch maker test to PPC assembly.

Which files would be affected?

• ofrak_patch_maker/ofrak_patch_maker_test/test_ppc_toolchain.py https://github.com/redballoonsecurity/ofrak/blob/c0b0cfd95f17543397224bf78bf6371c8ee6e166/ofrak_patch_maker/ofrak_patch_maker_test/test_ppc_toolchain.py#L39-L42

Does the proposed maintenance include non-doc string functional changes to the Python code?

Adding tests.

Are you interested in implementing it yourself?

Yes, someday.