PyOpenCLFakeNumpyNamespace.where: accept np.bool_ #1458

Job	Run time
Documentation	1m 51s
Flake8	14s
Examples Conda Py3	1m 26s
Tests for downstream project meshmode	11m 17s
Mypy	1m 40s
Tests for downstream project grudge	9m 11s
Pylint	1m 41s
Pytest Conda Py3 Intel	2m 9s
Tests for downstream project mirgecom	6s
Pytest Conda Py3 POCL	2m 31s
Tests for downstream project mirgecom_examples	6s
	32m 12s

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