Use 'final' and 'override' specifiers directly in ART.

Remove all uses of macros 'FINAL' and 'OVERRIDE' and replace them with
'final' and 'override' specifiers. Remove all definitions of these
macros as well, which were located in these files:
- libartbase/base/macros.h
- test/913-heaps/heaps.cc
- test/ti-agent/ti_macros.h

ART is now using C++14; the 'final' and 'override' specifiers have
been introduced in C++11.

Test: mmma art
Change-Id: I256c7758155a71a2940ef2574925a44076feeebf
diff --git a/compiler/utils/jni_macro_assembler.h b/compiler/utils/jni_macro_assembler.h
index f5df926..e0c2992 100644
--- a/compiler/utils/jni_macro_assembler.h
+++ b/compiler/utils/jni_macro_assembler.h
@@ -259,19 +259,19 @@
 template <typename T, PointerSize kPointerSize>
 class JNIMacroAssemblerFwd : public JNIMacroAssembler<kPointerSize> {
  public:
-  void FinalizeCode() OVERRIDE {
+  void FinalizeCode() override {
     asm_.FinalizeCode();
   }
 
-  size_t CodeSize() const OVERRIDE {
+  size_t CodeSize() const override {
     return asm_.CodeSize();
   }
 
-  void FinalizeInstructions(const MemoryRegion& region) OVERRIDE {
+  void FinalizeInstructions(const MemoryRegion& region) override {
     asm_.FinalizeInstructions(region);
   }
 
-  DebugFrameOpCodeWriterForAssembler& cfi() OVERRIDE {
+  DebugFrameOpCodeWriterForAssembler& cfi() override {
     return asm_.cfi();
   }
 
@@ -299,7 +299,7 @@
   JNIMacroLabelCommon() : JNIMacroLabel(kIsa) {
   }
 
-  virtual ~JNIMacroLabelCommon() OVERRIDE {}
+  virtual ~JNIMacroLabelCommon() override {}
 
  private:
   PlatformLabel label_;