[cmake] fix install directory for DuneUggridMacros.cmake

The install directory has to be ${DUNE_INSTALL_MODULEDIR}. Otherwise, the file will not be found by dune_process_dependency_macros from DuneMacros.cmake.

Can somebody with more cmake skills than me please ack this?

dune-common also uses ${DUNE_INSTALL_MODULEDIR}. So this matches the behavior of other DUNE modules.

mentioned in commit 8ded3002

Status changed to merged

mentioned in commit core/dune-common@ed41c330

mentioned in merge request core/dune-common!123 (merged)

mentioned in commit core/dune-common@17d3eab7

Mentioned in commit core/dune-common@ed41c330

Mentioned in commit core/dune-common@17d3eab7