Log Message:
ugrep: update to 3.7.4.

New --hexdump options to grep binary files and display binary matches in
hexadecimal with n hex lines before and after the match with --hexdump=Cn,
--hexdump=An for n lines after and --hexdump=Bn for n lines before.
Omitting n defaults to the entire matching line. Option -X is equivalent
to --hexdump=2C for 2 hex columns per line and entire matching line as
context. Includes user experience improvements, such as additional --help
information and --stats details.

We also made ugrep faster overall with performance improvements.