[test|grid] hotfix dgf_provider not finding dgf files

this should get a cleaner solution in the future

dune/xt/test/CMakeLists.txt

@@ -24,6 +24,14 @@ install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/gtest
         PATTERN "*")
 install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/main.hxx DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/dune/xt/test/)
 
+# this should ideally move back into the grid subdir, along with the files
+dune_symlink_to_source_files(FILES
+        gmsh_2d_simplices.msh
+        dgf_1d_interval.dgf
+        dgf_2d_interval.dgf
+        dgf_3d_interval.dgf
+        dgf_4d_interval.dgf)
+
 add_subdir_tests(common)
 add_subdir_tests(grid)
 add_subdir_tests(la)

dune/xt/test/grid/CMakeLists.txt

@@ -13,14 +13,6 @@
 
 enable_testing()
 
-# link grid files
-dune_symlink_to_source_files(FILES
-                             gmsh_2d_simplices.msh
-                             dgf_1d_interval.dgf
-                             dgf_2d_interval.dgf
-                             dgf_3d_interval.dgf
-                             dgf_4d_interval.dgf)
-
 dxt_exclude_from_headercheck(dd_subdomains_cube.hh)
 
 # we want to discard one of the tests via cmake_guard if UG is parallel, so define a suitable variable here