Fix memory exhaustion issues on 32bit architectures.

Changes in the patch below:
- less debug info (-g1) on all 32bit architectures except i386
- optimizing for size instead of speed with -Os (MinSizeRel)
  does not help with this kind of problems, "Release" is
  appropriate to make cmake not overwrite the added -gq
- build on linux-any

Closes: #906746
Thanks: Adrian Bunk for the report and patch.