Since commit d8417af0 (July 2011) cv::compare produces an array with
the same size and type as the input arrays.
Signed-off-by: Michael Hanselmann <public@hansmi.ch>

Also, removed needless check of BUILD_SHARED_LIBS in core; in that case,
only the current module's library type matters.

Previously it was missing.
Ordered all descriptors by year of first publication.