Fix coverage for ufuncs

[bryevdv]

This fixes the issue with ufuncs not being considered in the coverage reports, and also fixed them being missing from the comarison table:

legate37 ❯ cat foo.py 
import cunumeric as np

a = np.ndarray([1,2])
np.arccos(a)

~/work/cunumeric bryanv/ufunc_coverage*
legate37 ❯ legate foo.py --gpus 2 -cunumeric:report:coverage -cunumeric:report:dump-csv out.csv
cuNumeric API coverage: 3/3 (100.0%)
 
~/work/cunumeric bryanv/ufunc_coverage*
legate37 ❯ cat out.csv 
function_name,location,implemented
numpy.ndarray.__init__,foo.py:3,True
numpy.arccos,foo.py:4,True
numpy.ndarray.__init__,foo.py:4,True

[bryevdv]

Can't rely on __name__ since binary_ufunc, etc do not have

[magnatelee]

I can add that property if that's necessary.

[bryevdv]

noting all tests pass for me locally with ./test.py --use=cuda