Bump up the generator version, which is exposed in SPV test results.

SPIRV/GlslangToSpv.cpp

@@ -8197,7 +8197,8 @@ int GetSpirvGeneratorVersion()
     // return 5; // make OpArrayLength result type be an int with signedness of 0
     // return 6; // revert version 5 change, which makes a different (new) kind of incorrect code,
                  // versions 4 and 6 each generate OpArrayLength as it has long been done
-    return 7; // GLSL volatile keyword maps to both SPIR-V decorations Volatile and Coherent
+    // return 7; // GLSL volatile keyword maps to both SPIR-V decorations Volatile and Coherent
+    return 8; // switch to new dead block eliminator; use OpUnreachable
 }
 
 // Write SPIR-V out to a binary file

SPIRV/spvIR.h

@@ -300,7 +300,7 @@ protected:
 };
 
 // The different reasons for reaching a block in the inReadableOrder traversal.
-typedef enum ReachReason {
+enum ReachReason {
     // Reachable from the entry block via transfers of control, i.e. branches.
     ReachViaControlFlow = 0,
     // A continue target that is not reachable via control flow.