OpenGL ES 1.1 will be removed from the main branch, but this sample can
remain available as basic test of a legacy OpenGL ES 1.1 build.

This partially reverts https://swiftshader-review.googlesource.com/c/SwiftShader/+/43190

Bug: b/147516027
Change-Id: I344b5c591e6560317c53cfa2da9f092e948e3cfa
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/45709Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>