This test verifies that the swiftshader EGL libraries exists, can be loaded, has
its entry functions accessible, and we get the expected vendor/version strings.

Change-Id: Ifc29286cfaa83fa4c2412c073d383f2c1b58766f
Reviewed-on: https://swiftshader-review.googlesource.com/9168Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>