Don't display empty cmd window when starting GUI in Windows (partial fix for bug #41074). * installer-files/octave.bat: Add /B switch to start command for running octave-gui.exe. The cmd window from running octave.bat may still be shown briefly on some platforms.

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

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

^cross-tools/
^gnuplot/
^octave/
^tools/set_mxe_env.sh