DEPS.xwalk: Roll chromium-crosswalk to 954426

954426: Merge pull request #131 from yinli/volume-webaudio-trunk
[Android] [Backport] Volume is too low when playing audio through WebAud...
Merge pull request #1641 from yinli/roll_deps_to_webaudio_volume_fix

DEPS.xwalk: Roll chromium-crosswalk to 954426