vendor.sh: don't err on bruteforce me extract

it wouldn't exit with error status anyway, since i'm
setting +e here, but if that accidentally changed in
the future, i still wouldn't want this to exit.

the bruteforce me extraction naturally throws a lot of
errors, hence +e, because of how the extraction works,
but the result is checked at the end of the process,
to compensate. hence +e, because otherwise this brute
force extraction would never work.

therefore, this is an extremely theoretical bug fix, the
most quintessential of preemptive bug fixes, to the point
that it is actually rather pedantic.

The ":" in "|| :" will likely *never* be executed, but it
handles the theoretical case where the subshell exits with
non-zero status and +e is set; subshells aren't meant to
behave this way anyway, but who knows what cursed sh
implementation the user is on?

Signed-off-by: Leah Rowe <leah@libreboot.org>

include/vendor.sh

@@ -190,7 +190,7 @@ extract_intel_me_bruteforce()
 		cdir="$1"; [ "${cdir#/a}" != "$cdir" ] && cdir="${cdir#/}"
 		cd "$cdir" || :
 	done
-	)
+	) || :
 	rm -Rf "$sdir" || $err "extract_intel_me: !rm -Rf $sdir - $dontflash"
 }