grep: Update to version 3.12

grep: Update to version 3.12

- Update from version 3.11 to 3.12
- Update of rootfile not required
- Changelog
    3.12
	** Bug fixes
	  Searching a directory with at least 100,000 entries no longer fails
	   with "Operation not supported" and exit status 2. Now, this prints 1
	   and no diagnostic, as expected:
	     $ mkdir t && cd t && seq 100000|xargs touch && grep -r x .; echo $?
	     1
	   [bug introduced in grep 3.11]
	  -mN where 1 < N no longer mistakenly lseeks to end of input merely
	   because standard output is /dev/null.
	** Changes in behavior
	  The --unix-byte-offsets (-u) option is gone. In grep-3.7 (2021-08-14)
	   it became a warning-only no-op. Before then, it was a Windows-only no-op.
	  On Windows platforms and on AIX in 32-bit mode, grep in some cases
	   now supports Unicode characters outside the Basic Multilingual Plane.

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>