[test] adds spe10 expectations for sgrid

dune/gdt/test/linearelliptic/eocexpectations/swipdg-spe10-2dsgrid.cxx

@@ -29,11 +29,11 @@ public:
   static std::vector<double> results(const TestCaseType& /*test_case*/, const std::string type)
   {
     if (type == "L2")
-      return {};
+      return {2.73e-02, 2.35e-02};
     else if (type == "H1_semi")
-      return {};
+      return {4.64e-01, 6.31e-01};
     else if (type == "energy")
-      return {};
+      return {1.03e+00, 1.49e+00};
     else
       EXPECT_TRUE(false) << "test results missing for type: " << type;
     return {};
@@ -51,11 +51,11 @@ public:
   static std::vector<double> results(const TestCaseType& /*test_case*/, const std::string type)
   {
     if (type == "L2")
-      return {};
+      return {1.82e-02, 7.50e-03};
     else if (type == "H1_semi")
-      return {};
+      return {5.53e-01, 4.55e-01};
     else if (type == "energy")
-      return {};
+      return {1.62e+00, 1.33e+00};
     else
       EXPECT_TRUE(false) << "test results missing for type: " << type;
     return {};