Add support for bool arrays in ismember()

[OrestZborowski-SIG]

Adding support for bool arrays in ismember() could be useful.

[michaelneururer]

Note also the small bug:
rt.ismember(rt.FA([True]), rt.FA([1]))
which gives
TypeError: int64 not in allowed types for ismember
because of a typo in the code which retrieves the type of the second input even though the first input produced the error.