* modules/inttypes: New file. * modules/strtoimax, modules/strtoumax: Depend on inttypes. * lib/inttypes.h: New file. * lib/strtoimax.c: Assume <inttypes.h>. * m4/_inttypes_h.m4, m4/full-header-path.m4, m4/include_next: New files.