The dumux.pc.in is generated when making a new dune module. It is used by CMake to build the pc file.
The old file still hard wired a dependency on dune-pdelab.
After this patch the pc files gets the required dependencies from the dependencies variable (compare other dune modules).
Furthermore libraries and includes are also derived.

Reviewed by grueninger  


git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@14221 2fb0f335-1f38-0410-981e-8018bf24f1b0