SPV: Implement new extensions GL_KHX_device_group and GL_KHX_multiview.

These correspond to SPV_KHR_device_group and SPV_KHR_multiview.
Also, bring tests up to date with Khronos internals, and some misc. related changes.

SPIRV/doc.cpp

@@ -48,6 +48,7 @@
 namespace spv {
     extern "C" {
         // Include C-based headers that don't have a namespace
+        #include "GLSL.ext.KHR.h"
 #ifdef AMD_EXTENSIONS
         #include "GLSL.ext.AMD.h"
 #endif
@@ -318,15 +319,13 @@ const char* BuiltInString(int builtIn)
     case 42: return "VertexIndex";                 // TBD: put next to VertexId?
     case 43: return "InstanceIndex";               // TBD: put next to InstanceId?
 
-    case BuiltInCeiling:
-    default: return "Bad";
-
     case 4416: return "SubgroupEqMaskKHR";
     case 4417: return "SubgroupGeMaskKHR";
     case 4418: return "SubgroupGtMaskKHR";
     case 4419: return "SubgroupLeMaskKHR";
     case 4420: return "SubgroupLtMaskKHR";
-
+    case 4438: return "DeviceIndex";
+    case 4440: return "ViewIndex";
     case 4424: return "BaseVertex";
     case 4425: return "BaseInstance";
     case 4426: return "DrawIndex";
@@ -340,6 +339,7 @@ const char* BuiltInString(int builtIn)
     case 4997: return "BaryCoordSmoothSampleAMD";
     case 4998: return "BaryCoordPullModelAMD";
 #endif
+
 #ifdef NV_EXTENSIONS
     case 5253: return "ViewportMaskNV";
     case 5257: return "SecondaryPositionNV";
@@ -347,6 +347,9 @@ const char* BuiltInString(int builtIn)
     case 5260: return "PositionPerViewNV";
     case 5261: return "ViewportMaskPerViewNV";
 #endif
+
+    case BuiltInCeiling:
+    default: return "Bad";
     }
 }
 
@@ -823,13 +826,13 @@ const char* CapabilityString(int info)
     case 56: return "StorageImageWriteWithoutFormat";
     case 57: return "MultiViewport";
 
-    case CapabilityCeiling:
-    default: return "Bad";
-
     case 4423: return "SubgroupBallotKHR";
     case 4427: return "DrawParameters";
     case 4431: return "SubgroupVoteKHR";
 
+    case 4437: return "DeviceGroup";
+    case 4439: return "MultiView";
+
 #ifdef NV_EXTENSIONS
     case 5251: return "GeometryShaderPassthroughNV";
     case 5254: return "ShaderViewportIndexLayerNV";
@@ -838,6 +841,8 @@ const char* CapabilityString(int info)
     case 5262: return "PerViewAttributesNV";
 #endif
 
+    case CapabilityCeiling:
+    default: return "Bad";
     }
 }
 
@@ -1166,10 +1171,6 @@ const char* OpcodeString(int op)
     case 319: return "OpAtomicFlagClear";
     case 320: return "OpImageSparseRead";
 
-    case OpcodeCeiling:
-    default:
-        return "Bad";
-
     case 4421: return "OpSubgroupBallotKHR";
     case 4422: return "OpSubgroupFirstInvocationKHR";
     case 4428: return "OpSubgroupAllKHR";
@@ -1187,6 +1188,10 @@ const char* OpcodeString(int op)
     case 5006: return "OpGroupUMaxNonUniformAMD";
     case 5007: return "OpGroupSMaxNonUniformAMD";
 #endif
+
+    case OpcodeCeiling:
+    default:
+        return "Bad";
     }
 }