expat: uprev to 2.2.10

A "Pointer-overflow in hashTableIterInit" was being caught by the UBSAN
fuzzer and an uprev to 2.2.10 should fix as mentioned in the changelogs:
https://github.com/libexpat/libexpat/blob/R_2_2_10/expat/Changes

BUG=chromium:1151394
TEST=emerge-$B expat

Change-Id: Ifaf727b620d62e7ae4cafedfc8606ee9ded296ab
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2551685
Tested-by: Jae Hoon Kim <kimjae@chromium.org>
Auto-Submit: Jae Hoon Kim <kimjae@chromium.org>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Commit-Queue: Amin Hassani <ahassani@chromium.org>
2 files changed