GH-113655: Lower the C recursion limit for HPPA, PPC64 and SPARC (#124264)

Lower the C recursion limit for HPPA, PPC64 and SPARC, as they use
relatively large stack frames that cause e.g. `test_descr` to hit
a stack overflow.  According to quick testing, it seems that values
around 8000 are max for HPPA and PPC64 (ELFv1 ABI) and 7000 for SPARC64.
To keep things safe, let's use 5000 for PPC64 and 4000 for SPARC.

Co-authored-by: Michał Górny <mgorny@gentoo.org>