[cmake] Do not use DUNE_INSTALL_LIBDIR but CMAKE_INSTALL_LIBDIR
The behavior was irritating, as the installation location of pkg-config file depended on the module providing a library.
Fixes #361 (closed)
Edited by Christoph Grüninger
The behavior was irritating, as the installation location of pkg-config file depended on the module providing a library.
Fixes #361 (closed)