Calls of the form `x.m(args)` where either `x = X` or x = X()` and X is a class, and `m` is a classmethod or staticmethod are not currently specialized.

Typically the `x.m()` will translate to:

LOAD_FAST x
LOAD_METHOD "m"
PRECALL_METHOD 0
CALL 0

Since classmethods and staticmethods are descriptors, only the LOAD_METHOD should need specializing. The PRECALL/CALL will be able to handle the resulting values without modification.