dev-libs/flatbuffers: Increase the revision number

Increase the revision number could make sure the reflection file
that is installed by https://crrev.com/c/3399366 would propagate
into our pre-build system.

https://crrev.com/c/3420866 depends on this change.

BUG=b:211717735
TEST=Build OK.

Change-Id: I33d5844acad375f281385961359bd4cd984971df
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/3421206
Tested-by: Yi Chou <yich@google.com>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Yi Chou <yich@google.com>
1 file changed