fake build for empty test folders

dune/fem-dg/examples/incompnavierstokes/test/BuildTests.cmake

+# do nothing

dune/fem-dg/examples/incompnavierstokes/test/CMakeLists.txt

@@ -7,7 +7,6 @@ add_definitions( "-DGRIDDIM=2" )
 
 if( NOT FEMDG_FAST_TESTBUILD )
   if( DUNE_FEM_DG_VERSION VERSION_LESS "2.4.1" )
-    #message( STATUS "Using old test build system (2.4 compability mode) " )
     #add_executable( incompnavierstokesall ../main.cc )
     #dune_target_enable_all_packages( incompnavierstokesall )
     #dune_add_test( incompnavierstokesall )
@@ -19,7 +18,8 @@ if( NOT FEMDG_FAST_TESTBUILD )
 endif()
 
 if( DUNE_FEM_DG_VERSION VERSION_LESS "2.4.1" )
-  #message( STATUS "Using old test build system (2.4 compability mode) " )
+  # fake empty test
+  configure_file( BuildTests.cmake BuildTests.cmake @ONLY)
   #add_executable( incompnavierstokes ../main.cc )
   #set_property(TARGET incompnavierstokes APPEND PROPERTY 
   #             COMPILE_DEFINITIONS "POLORDER=2" )