Circumvent an error in test_dot for Numpy 1.12.0.

Numpy 1.12.0 updated iscomplexobj which always shows False for
tinyarrays, which makes assert_almost_equal fail for complex
array-valued arguments, as they will not be split up into real and
imaginary part. We circumvent this bug by testing every entry
separately in this case. This bug will be fixed for Numpy 1.12.1.

Fixes #11
2 jobs for fix-test-on-numpy-1.12.0 in 20 seconds (queued for 1 second)
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  Test
passed python2 #8953

00:00:20

passed python3 #8954

00:00:20