upgrade gettext module to gettext-0.15

[Bruno Haible]

Hi,

I upgraded the gettext module to version 0.15.

The longlong.m4 and ulonglong.m4 still differ (a pending issue).

2006-07-22  Bruno Haible  <address@hidden>

        * modules/gettext: Update to gettext-0.15.
        (Files): Remove m4/isc-posix.m4. Add m4/lock.m4, m4/visibility.m4.
        Replace m4/inttypes.m4 with m4/inttypes-h.m4.
        * m4/gettext.m4: Update from GNU gettext-0.15.
        * m4/nls.m4: Likewise.
        * m4/po.m4: Likewise.
        * m4/inttypes-pri.m4: Likewise.
        * m4/inttypes-h.m4: Renamed from m4/inttypes.m4.
        (gl_HEADER_INTTYPES_H): Renamed from gt_HEADER_INTTYPES_H.