…avoid a runtime error

…MIPS

…nd N64 ABIs

…tches

…ss of 32 or 64 bit values

Also adds some more macro-enabled debug prints

…nitial MIPS support for O32, N32, N64 ABIs

…cal functions

Long term we might need a better design, but this seems to be sufficient
for mips o32/n32/n64 ABIs.

When two callnos map to the same function name (even with different
signatures) remove duplicate handling logic. We may wish to improve this
in the future so users can request a specific variant of a syscall, but
this is just a cleaner version of our existing logic.

Templates changed to clearly show details of multiple callnos/prototypes
or to leave generated code unchanged if there's only a single callno

These changes may cause issues when re-generating signatures for other
architectures, if it happens let me know.

…mips64

…details