Avoid a module name and include file name collision with gnulib.

Avoid a module name and include file name collision with gnulib.

* gnulib-local/lib/mem-hash-map.h: Renamed from gnulib-local/lib/hash.h.
* gnulib-local/lib/mem-hash-map.c: Renamed from gnulib-local/lib/hash.c.
Include mem-hash-map.h instead of hash.h.
* gnulib-local/modules/mem-hash-map: Renamed from gnulib-local/modules/hash.
Update.
* gnulib-local/Makefile.am (EXTRA_DIST): Update.
* autogen.sh (GNULIB_MODULES_TOOLS_FOR_SRC, GNULIB_MODULES_LIBGETTEXTPO):
Update.
* libtextstyle/gnulib-local/modules/term-styled-ostream (Depends-on): Likewise.
* gettext-tools/src/its.c: Include mem-hash-map.h instead of hash.h.
* gettext-tools/src/locating-rule.c: Likewise.
* gettext-tools/src/message.c: Likewise.
* gettext-tools/src/message.h: Likewise.
* gettext-tools/src/read-desktop.h: Likewise.
* gettext-tools/src/write-mo.c: Likewise.
* gettext-tools/src/write-qt.c: Likewise.
* gettext-tools/src/x-c.c: Likewise.
* gettext-tools/src/x-csharp.c: Likewise.
* gettext-tools/src/x-desktop.c: Likewise.
* gettext-tools/src/x-elisp.c: Likewise.
* gettext-tools/src/x-java.c: Likewise.
* gettext-tools/src/x-librep.c: Likewise.
* gettext-tools/src/x-lisp.c: Likewise.
* gettext-tools/src/x-scheme.c: Likewise.
* gettext-tools/src/x-sh.c: Likewise.
* gettext-tools/src/x-tcl.c: Likewise.
* gettext-tools/src/x-vala.c: Likewise.
* gettext-tools/src/xg-arglist-callshape.h: Likewise.
* gettext-tools/src/xg-arglist-context.h: Likewise.
* libtextstyle/gnulib-local/lib/term-styled-ostream.oo.c: Likewise.