mkefidsk currently writes a startup.nsh with embedded control characters.
This happens because \b etc are control sequences to the shell echo
command when using dash. The resulting startup.nsh causes the bootup
to fail, and the user is dropped into the EFI shell to manually run
startup.nsh.
Patch originally provided by Troy D. Hanson <troy.hanson@jhuapl.edu>
[YOCTO #9665]
Signed-off-by: Saul Wold <sgw@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
