dev-util/valgrind: Version bump to 3.18.1

Adds partial support for ARM v8.2, support for Rust v0 name mangling, and
support for glibc 2.34. Also allows us to drop the now-upstreamed LLD
patch.

BUG=b:204116961
TEST=emerge-trogdor valgrind works

Change-Id: Ia9b251b7ab45c7f8a4b1060f3e280df035943086
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/3242210
Tested-by: Matt Turner <msturner@google.com>
Auto-Submit: Matt Turner <msturner@google.com>
Commit-Queue: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
3 files changed