This allows validating the EGL image handles. It also ensures that on 64-bit
platforms the handles fit in 32-bit so they can be exchanged through 32-bit
applications (e.g. on a 32-bit virtual machine).

Change-Id: Ie02b00edd2cf7fa02b38316ee7d21c22eae720b5
Reviewed-on: https://swiftshader-review.googlesource.com/5500Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>