* modules/fts (Files): Remove m4/inttypes-pri.m4.

* modules/fts (Files): Remove m4/inttypes-pri.m4.
* modules/fts-lgpl (Depends-on): Remove gettext.
* lib/fts.c: Don't worry about debugging on pre-C99-comopatible hosts;
the configuration hassle isn't worth it.
Include inttypes.h and stdint.h unconditionally if FTS_DEBUG.
(LONGEST_MODIFIER, PRIuMAX): Remove.
* m4/fts.m4 (gl_FUNC_FTS_CORE): Don't check for inttypes.h or stdint.h,
and don't require gt_INTTYPES_PRI.