Use GNU install directories and activate new policy for FILE GLOB_RECURSE

[[Imported from SVN: r6894]]

cmake/modules/DuneMacros.cmake

@@ -310,6 +310,7 @@ macro(dune_project)
   else(_mod_cmake)
     message(STATUS "There are no tests for module ${DUNE_MOD_NAME}.")
   endif(_mod_cmake)
+  include(GNUInstallDirs)
 endmacro(dune_project MODULE_DIR)
 
 # create a new config.h file and overwrite the existing one

cmake/scripts/FindFiles.cmake

+#Do not follow symlinks during FILE GLOB_RECURSE
+cmake_policy(SET CMP0009 NEW)
 file(GLOB_RECURSE makefiles RELATIVE ${RELPATH} "CMakeLists.txt")
 foreach(_file ${makefiles})
   string(REGEX MATCH ".*/test" _testdir ${_file})