For cases where a CMAKE_XXX variable provides a default value for a
XXX target property, the convention used in the documentation is to
put the detailed explanation in the target property docs, leaving the
variable docs to be fairly minimal and cross-reference the target
property docs for details.
When the (CMAKE_)LINK_LIBRARIES_STRATEGY docs were first added,
they were the opposite of this convention, putting the details in the
variable docs instead of the property docs. This change moves the
details to the property docs to make it consistent with the prevailing
convention used elsewhere.