ASM_MARMASM: Fix VS flag table entry for debug flag

`$(VCTargetsPath)\BuildCustomizations\marmasm.xml` defines the
`GenerateDebugInformation` boolean setting to map to `-g`.

Templates/MSBuild/FlagTables/v10_MARMASM.json

@@ -67,7 +67,7 @@
     ]
   },
   {
-    "name": "DebugInformation",
+    "name": "GenerateDebugInformation",
     "switch": "g",
     "comment": "Generate debugging information.",
     "value": "true",