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/x86_64/assembler_x86_64.h b/compiler/utils/x86_64/assembler_x86_64.h
index e4d72a7..e696635 100644
--- a/compiler/utils/x86_64/assembler_x86_64.h
+++ b/compiler/utils/x86_64/assembler_x86_64.h
@@ -351,7 +351,7 @@
 };
 
 
-class X86_64Assembler FINAL : public Assembler {
+class X86_64Assembler final : public Assembler {
  public:
   explicit X86_64Assembler(ArenaAllocator* allocator)
       : Assembler(allocator), constant_area_(allocator) {}
@@ -844,8 +844,8 @@
   //
   int PreferredLoopAlignment() { return 16; }
   void Align(int alignment, int offset);
-  void Bind(Label* label) OVERRIDE;
-  void Jump(Label* label) OVERRIDE {
+  void Bind(Label* label) override;
+  void Jump(Label* label) override {
     jmp(label);
   }
   void Bind(NearLabel* label);