Added OpenGL ES 3.0 supported formats to the list
of formats supported by glRenderbufferStorage().

Change-Id: Ifc73de17b678e2a5b782d2fe239d5442b98edd95
Reviewed-on: https://swiftshader-review.googlesource.com/3290Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>