fix error with TBB2020

dune/xt/common/math.hh

@@ -85,6 +85,7 @@ struct AbsoluteValue
 {
   static T result(const T& val)
   {
+    using Dune::XT::Common::internal::abs;
     using std::abs;
     return abs(val);
   }

dune/xt/grid/parallel/partitioning/ranged-internal.hh

@@ -24,7 +24,12 @@
 #include <vector>
 
 #if HAVE_TBB
-#include <tbb/tbb_stddef.h>
+// The new TBB oneAPI does not have this file anymore
+#if __has_include(<tbb/tbb_stddef.h>)
+#  include <tbb/tbb_stddef.h>
+#  else
+#  include <tbb/blocked_range.h>
+#  endif
 #endif
 
 #include <dune/xt/grid/type_traits.hh>