This enables binding any texture mipmap level as a framebuffer attachment. Bug swiftshader:104 Change-Id: I3d4ea637ddd38bb62ca1363fe2c69c569eea36e9 Reviewed-on: https://swiftshader-review.googlesource.com/18008Reviewed-by: Alexis Hétu <sugoi@google.com> Reviewed-by: Lingfeng Yang <lfy@google.com> Tested-by: Nicolas Capens <nicolascapens@google.com>
