Output directory in which to build LIBRARY target files.
This property specifies the directory into which library target files
should be built. The property value may use
Multi-configuration generators (VS, Xcode) append a per-configuration
subdirectory to the specified directory unless a generator expression
This property is initialized by the value of the variable CMAKE_LIBRARY_OUTPUT_DIRECTORY if it is set when a target is created.
See also the
LIBRARY_OUTPUT_DIRECTORY_<CONFIG> target property.