Implement new revision of extension GL_AMD_shader_ballot

- Add support for invocation functions with "InclusiveScan" and
  "ExclusiveScan" modes.
- Add support for invocation functions taking int64/uint64/doube/float16
  as inout data types.

SPIRV/SpvBuilder.cpp

@@ -2354,7 +2354,7 @@ void Builder::dump(std::vector<unsigned int>& out) const
 
     for (auto it = extensions.cbegin(); it != extensions.cend(); ++it) {
         Instruction extInst(0, 0, OpExtension);
-        extInst.addStringOperand(*it);
+        extInst.addStringOperand(it->c_str());
         extInst.dump(out);
     }