Fix "make distcheck" after gnulib changed.
* gettext-runtime/m4/fcntl-o.m4: Trivial update from gnulib.
* gettext-runtime/m4/flexmember.m4: Likewise.
* gettext-runtime/m4/iconv.m4: Likewise.
* gettext-runtime/m4/intlmacosx.m4: Likewise.
* gettext-runtime/m4/inttypes_h.m4: Likewise.
* gettext-runtime/m4/nls.m4: Likewise.
* gettext-runtime/m4/progtest.m4: Likewise.
* gettext-runtime/m4/size_max.m4: Likewise.
* gettext-runtime/m4/stdint_h.m4: Likewise.
* gettext-runtime/m4/xsize.m4: Likewise.
