build-gettext: Don't build emacs bindings. * src/build-gettext.mk: The `emacs` installed on the build system might be incompatible with the STL built by build-gcc. We probably don't need the emacs bindings for the `gettext` build tool anyway. So skip building those bindings.

^settings\.mk
^usr/
^log/
^pkg/
^built-packages/
^installed-packages/
^wip/
^tmp-.*/

^autom4te\.cache/
^configure
^config\.status
^config\.log
^Makefile
^cmake-toolchain-file\.stamp

^cross-tools/
^gnuplot/
^octave/
^tools/makeinst-script\.sh
^tools/set-mxe-env\.sh