Merge topic 'vs-c11'

b11c723678 VS: Populate `std:c{11,17}` flag table entries for v142

Acked-by: Kitware Robot <[email protected]>
Acked-by: Raul Tambre <[email protected]>
Merge-request: !5290

Templates/MSBuild/FlagTables/v142_CL.json

@@ -454,6 +454,20 @@
     "value": "stdcpplatest",
     "flags": []
   },
+  {
+    "name": "LanguageStandard_C",
+    "switch": "std:c11",
+    "comment": "ISO C11 Standard",
+    "value": "stdc11",
+    "flags": []
+  },
+  {
+    "name": "LanguageStandard_C",
+    "switch": "std:c17",
+    "comment": "ISO C17 (2018) Standard",
+    "value": "stdc17",
+    "flags": []
+  },
   {
     "name": "PrecompiledHeader",
     "switch": "Yc",