FPII-1940: DO NOT MERGE - external/libvpx/libwebm: Update snapshot

DO NOT MERGE - external/libvpx/libwebm: Update snapshot

Update libwebm snapshot.

Upstream git hash: 229f49347d19b0ca0941e072b199a242ef6c5f2b

BUG=23167726

Change-Id: I502d764026690ffaad48a122ebf19c4e79edc997
(cherry picked from commit 4bd71307071e98d50b4e608b2e1268782960b783)
2 files changed