angle_end2end_tests included tests that used both the entry points
from our shared libraries as well as calling libANGLE classes like
gl::Context directly. Split these into a new test executable.

This also removes the libANGLE code from all the end2end tests.

It's necessary to add static versions of libEGL and libGLESv2 so
that we call safely call methods in libANGLE an the entry points
from the same target.

BUG=angleproject:1660

Change-Id: I6d82021b9300231ddb5fee435e5d77728f8f1292
Reviewed-on: https://chromium-review.googlesource.com/419175Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>