build. Always reinstall xsession files.
build. Always reinstall xsession files.

I.e. every `make install` will overwrite all xsession files (~/.Xsession and
ones in ~/.Xsession.d directory), if any differ. This makes `make` bahavior
consistent and fixes occasional reinstalls (when modification time of
~/.Xsession.d directory changes) of ~/.Xsession.d files caused by dependency
on ~/.Xsession.d directory.

sgf-dma/sgf-xmonad-config