payloads/external/Memtest86Plus: Update stable to latest commit

This brings in two additional changes:
- Use OBJCOPY if available.
- Fix strstr() indent and rewrite to not call strlen() on each char.

Change-Id: Id13dfda28c545332fce8282e849f379bf50629b9
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/16605
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
1 file changed