chromium: Update beta and dev to latest versions.

beta: 34.0.1847.60 -> 35.0.1916.47 (builds fine, tested)
dev:  35.0.1883.0  -> 36.0.1941.0  (builds fine, tested)

For the new version 36, we needed to rebase our user namespaces sandbox
patch, because http://crbug.com/312380

 is preparing for an upstream
implementation of the same functionality.

Also, we need to add ply and jinja2 to the depends on version 36. This
is done unconditionally, because I want to avoid cluttering up the
expressions with various versionOlder checks.

The sandbox binary had to be fixed as well and we no longer use system
zlib, as - who might have guessed it - it's a fast moving target at
Chromium as well.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>