grep color highlighting doesn't work in Windows 10's new console

[StephanTLavavej]

On Windows 10, version 1909, build 18363.657, grep color highlighting doesn't work in the new console.

I'm not sure why SetConsoleTextAttribute isn't working, but it appears that ENABLE_VIRTUAL_TERMINAL_PROCESSING would allow escape sequences to work (which would also make grep-lock.patch unnecessary). See:

• https://stackoverflow.com/questions/4053837/colorizing-text-in-the-console-with-c/54427199#54427199
• https://stackoverflow.com/questions/46030331/enable-virtual-terminal-processing-and-disable-newline-auto-return-failing/46044584#46044584

[StephanTLavavej]

grep 3.7 color highlighting works on Win10 21H1. I might have been confused - I forgot that set_distro_paths.bat runs doskey grep=grep --color=auto $*.