By using the static libGLESv2 and libEGL, perftests can correctly
test ANGLE internals (like the Index Data Manager) without having
to export across shared object boundaries.

This also will simplify invoking the perftests on the bots because
we don't have to configure a special rpath to find the various
shared objects it would otherwise need.

BUG=angleproject:1660
BUG=chromium:675997

Change-Id: I114abb0756cf6f83e15025a0bcf292faf0064f5e
Reviewed-on: https://chromium-review.googlesource.com/425712Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>