Treat ASCII 0x7F as backspace, rather than delete, for TTY terminals. This better matches the default Linux terminal settings that are used when connecting to a simulated platform using xterm or a similar terminal program. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Roy Franz <roy.franz@linaro.org> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Feng Tian <feng.tian@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17896 6f19259b-4bc3-4df7-8a09-765794883524