Conversion of COO from GCXS alters the property of coordinate matrix.

[Harshit Gupta]

To Reproduce

import sparse
import numpy as np

s1 = sparse.random(())
s2 = s1.asformat("gcxs")
print(np.array_equal(s1.coords,  s2.tocoo().coords))
#Outputs False

Expected behavior
It should print True

System

• OS and version: Pop OS 21.04
• sparse version master
• NumPy version 1.20.3
• Numba version 0.54.1