Given a 2-D binary matrix, find if it has a lone star.
Lone start is a index which is 1 in the matrix such that there are no other 1s in that row and column.
Eg:
[0, 1, 0, 0]
[1, 0, 0, 1]
[0, 1, 0, 0]
[0, 0, 1, 0]

Returns true. This is a lone star index -> (3,2).