replace OVERRIDE with override in courgette/

R=dgarrett@chromium.org
BUG=417463

Review URL: https://codereview.chromium.org/655553003

Cr-Commit-Position: refs/heads/master@{#299446}

courgette/disassembler_elf_32_x86.h

@@ -21,17 +21,17 @@ class DisassemblerElf32X86 : public DisassemblerElf32 {
     explicit TypedRVAX86(RVA rva) : TypedRVA(rva) {
     }
 
-    virtual CheckBool ComputeRelativeTarget(const uint8* op_pointer) OVERRIDE {
+    virtual CheckBool ComputeRelativeTarget(const uint8* op_pointer) override {
       set_relative_target(Read32LittleEndian(op_pointer) + 4);
       return true;
     }
 
     virtual CheckBool EmitInstruction(AssemblyProgram* program,
-                                       RVA target_rva) OVERRIDE {
+                                       RVA target_rva) override {
       return program->EmitRel32(program->FindOrMakeRel32Label(target_rva));
     }
 
-    virtual uint16 op_size() const OVERRIDE { return 4; }
+    virtual uint16 op_size() const override { return 4; }
   };
 
   explicit DisassemblerElf32X86(const void* start, size_t length);