gentoo-syntax: upgraded package to upstream

Upgraded app-vim/gentoo-syntax to version 20210911 on amd64

BUG=chromium:1277804
TEST=`sudo emerge gentoo-syntax`

Change-Id: Id645ed3dcf7456914b84ec91ff0410d7099eaab5
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/3322356
Tested-by: David Greenaway <dgreenaway@google.com>
Commit-Queue: David Greenaway <dgreenaway@google.com>
Auto-Submit: David Greenaway <dgreenaway@google.com>
Reviewed-by: Sam McNally <sammc@chromium.org>
Commit-Queue: Sam McNally <sammc@chromium.org>
3 files changed