xlat/gen.sh: prepare for adding #val_type directive support
xlat/gen.sh: prepare for adding #val_type directive support

This is essentially a no-op change that makes the following change
easier to read.

* xlat/gen.sh (print_xlat, print_xlat_pair): New functions.
(cond_xlat, gen_header): Use them.

Saruta/strace,cuviper/strace,Saruta/strace,cuviper/strace,Saruta/strace,Saruta/strace,Saruta/strace,cuviper/strace,cuviper/strace,cuviper/strace