Revert get target property removal

If 'CMAKE_ARCHIVE_OUTPUT_DIRECTORY' is used to customize the output folders of oce-win-bundle libraries, the oce build will set FREETYPE_LIBRARY and related variables to the wrong paths.

This patch fixes that bug.

The commit that inserted this removal in the first place (https://github.com/tpaviot/oce/pull/465) did not provide any explanation for it.

See: https://groups.google.com/forum/#!topic/oce-dev/Leobw8Dk8hw

I suspect that the commit that introduced this bug did so by accident since the commit message only explains the first three lines changed.