desktop/bashrun2: Use systemwide dir for bash completion files

desktop/bashrun2/bashrun2.SlackBuild

@@ -92,7 +92,10 @@ make install-strip DESTDIR=$PKG
 
 mv $PKG/etc/xdg/bashrun2/bashrun2.rc $PKG/etc/xdg/bashrun2/bashrun2.rc.new
 mv $PKG/etc/xdg/bashrun2/plugins/terminal.rc $PKG/etc/xdg/bashrun2/plugins/terminal.rc.new
-mv $PKG/etc/bash_completion.d/bashrun2 $PKG/etc/bash_completion.d/bashrun2.new
+
+mkdir -p $PKG/usr/share/bash-completion/completions
+mv $PKG/etc/bash_completion.d/bashrun2 $PKG/usr/share/bash-completion/completions/bashrun2
+rm -rf $PKG/etc/bash_completion.d
 
 find $PKG | xargs file | grep -e "executable" -e "shared object" | grep ELF \
   | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true