VS: Fix /MANIFESTUAC:NO linker option mapping

Original header commits:
 v10/v11/v12 commit v3.0.0-rc5~3^2
 v140 commit v3.1.0-rc1~358^2~3

There are no versions of /MANIFESTUAC:NO where addition values are
appended.  Remove both of the MANIFESTUAC:NO entries from our flag
tables and replace them with one which would set EnableUAC to false and
immediately stop processing the /MANIFESTUAC:NO option.

Templates/MSBuild/FlagTables/v10_Link.json

@@ -536,11 +536,7 @@
     "switch": "MANIFESTUAC:NO",
     "comment": "Enable User Account Control (UAC)",
     "value": "false",
-    "flags": [
-      "UserValue",
-      "UserIgnored",
-      "Continue"
-    ]
+    "flags": []
   },
   {
     "name": "EnableUAC",

Templates/MSBuild/FlagTables/v11_Link.json

@@ -599,11 +599,7 @@
     "switch": "MANIFESTUAC:NO",
     "comment": "Enable User Account Control (UAC)",
     "value": "false",
-    "flags": [
-      "UserValue",
-      "UserIgnored",
-      "Continue"
-    ]
+    "flags": []
   },
   {
     "name": "EnableUAC",

Templates/MSBuild/FlagTables/v12_Link.json

@@ -599,11 +599,7 @@
     "switch": "MANIFESTUAC:NO",
     "comment": "Enable User Account Control (UAC)",
     "value": "false",
-    "flags": [
-      "UserValue",
-      "UserIgnored",
-      "Continue"
-    ]
+    "flags": []
   },
   {
     "name": "EnableUAC",

Templates/MSBuild/FlagTables/v140_Link.json

@@ -634,11 +634,7 @@
     "switch": "MANIFESTUAC:NO",
     "comment": "Enable User Account Control (UAC)",
     "value": "false",
-    "flags": [
-      "UserValue",
-      "UserIgnored",
-      "Continue"
-    ]
+    "flags": []
   },
   {
     "name": "EnableUAC",

Templates/MSBuild/FlagTables/v141_Link.json

@@ -648,11 +648,7 @@
     "switch": "MANIFESTUAC:NO",
     "comment": "Enable User Account Control (UAC)",
     "value": "false",
-    "flags": [
-      "UserValue",
-      "UserIgnored",
-      "Continue"
-    ]
+    "flags": []
   },
   {
     "name": "EnableUAC",