Add meta-constraints for the parisc 64-bit

[paulgazz]

When using krepair on Linux kernel commit 53d862fac4a0, klocalizer is unaware of constraints between using the parisc64 architecture and BITS==64. As with other architectures, this information is not necessarily explicit and is instead, for multiple archs that share an arch directory, is hard-coded per architecture here: https://github.com/paulgazz/kmax/blob/master/kmax/arch.py#L87 Add parisc64 here.