Fix -Wextra-semi warnings in headers used in Chromium

SPIRV/SpvTools.h

@@ -75,6 +75,6 @@ void SpirvToolsLegalize(const glslang::TIntermediate& intermediate, std::vector<
 
 #endif
 
-}; // end namespace glslang
+} // end namespace glslang
 
-#endif // GLSLANG_SPV_TOOLS_H
\ No newline at end of file
+#endif // GLSLANG_SPV_TOOLS_H

SPIRV/disassemble.h

@@ -48,6 +48,6 @@ namespace spv {
     // disassemble with glslang custom disassembler
     void Disassemble(std::ostream& out, const std::vector<unsigned int>&);
 
-};  // end namespace spv
+}  // end namespace spv
 
 #endif // disassembler_H

SPIRV/doc.h

@@ -255,4 +255,4 @@ const char* AccessQualifierString(int attr);
 
 void PrintOperands(const OperandParameters& operands, int reservedOperands);
 
-};  // end namespace spv
+}  // end namespace spv