nsis-installer: add bash window menu if devel tools enabled * binary-dist-rules.mk: if devel tools enabled, install cmdshell.bat, fix paths that were in build tools prefix * dist-files.mk: add cmdshell.bat * installer-files/cmdshell.bat: new file * makeinst-script.sh: if cmdshell.bat exists, include in installer, and add shortcut

mxe.cc