Fixes Android Lollipop (and older) build failures.

Change-Id: I30481a59562854b9891a2ac82ac2e7aab8ff570c
Reviewed-on: https://swiftshader-review.googlesource.com/9709Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Corentin Wallez <cwallez@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>