Update grammar for SPV_EXT_optnone / SPV_INTEL_optnone

Author: Naghasan

include/spirv/unified1/spirv.core.grammar.json

@@ -10364,15 +10364,10 @@
         },
         {
           "enumerant" : "OptNoneEXT",
+          "aliases" : ["OptNoneINTEL"],
           "value" : "0x10000",
           "capabilities" : [  "OptNoneEXT" ],
           "version" : "None"
-        },
-        {
-          "enumerant" : "OptNoneINTEL",
-          "value" : "0x10000",
-          "capabilities" : [  "OptNoneINTEL" ],
-          "version" : "None"
         }
       ]
     },
@@ -16091,14 +16086,9 @@
         },
         {
           "enumerant" : "OptNoneEXT",
+          "aliases" : ["OptNoneINTEL"],
           "value" : 6094,
-          "extensions" : [ "SPV_EXT_optnone" ],
-          "version" : "None"
-        },
-        {
-          "enumerant" : "OptNoneINTEL",
-          "value" : 6094,
-          "extensions" : [ "SPV_INTEL_optnone" ],
+          "extensions" : [ "SPV_EXT_optnone", "SPV_INTEL_optnone" ],
           "version" : "None"
         },
         {