hterm: bump to 1.57
hterm: bump to 1.57

Change-Id: Iddb13b732f3bbd18c08ee70816e34e5fe8d88e17
Reviewed-on: https://chromium-review.googlesource.com/337561
Reviewed-by: Rob Ginda <4419ac4e35d191308e944202d542b192188656d1@chromium.org>
Tested-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>

chromium/hterm,chromium/hterm,chromium/hterm,chromium/hterm