ART: Add missing namespace comments

Add closing namespace comments.

Bug: 32619234
Test: m
Change-Id: I1f50e09dcd1038c4b540b87e5c19e319c1f592e4
diff --git a/compiler/compiler.h b/compiler/compiler.h
index 908d366..cd4c591 100644
--- a/compiler/compiler.h
+++ b/compiler/compiler.h
@@ -25,11 +25,11 @@
 
 namespace jit {
   class JitCodeCache;
-}
+}  // namespace jit
 namespace mirror {
   class ClassLoader;
   class DexCache;
-}
+}  // namespace mirror
 
 class ArtMethod;
 class CompilerDriver;
diff --git a/compiler/debug/elf_debug_writer.h b/compiler/debug/elf_debug_writer.h
index 07f7229..5d68810 100644
--- a/compiler/debug/elf_debug_writer.h
+++ b/compiler/debug/elf_debug_writer.h
@@ -29,7 +29,7 @@
 class OatHeader;
 namespace mirror {
 class Class;
-}
+}  // namespace mirror
 namespace debug {
 struct MethodDebugInfo;
 
diff --git a/compiler/driver/compiler_options.h b/compiler/driver/compiler_options.h
index 5a82021..89c2537 100644
--- a/compiler/driver/compiler_options.h
+++ b/compiler/driver/compiler_options.h
@@ -31,7 +31,7 @@
 
 namespace verifier {
   class VerifierDepsTest;
-}
+}  // namespace verifier
 
 class DexFile;
 
diff --git a/compiler/optimizing/intrinsics_arm64.h b/compiler/optimizing/intrinsics_arm64.h
index 3c53517..ff59ce9 100644
--- a/compiler/optimizing/intrinsics_arm64.h
+++ b/compiler/optimizing/intrinsics_arm64.h
@@ -24,7 +24,8 @@
 
 class MacroAssembler;
 
-}}  // namespace vixl::aarch64
+}  // namespace aarch64
+}  // namespace vixl
 
 namespace art {
 
diff --git a/compiler/utils/label.h b/compiler/utils/label.h
index 0f82ad5..4c6ae8e 100644
--- a/compiler/utils/label.h
+++ b/compiler/utils/label.h
@@ -29,24 +29,24 @@
 namespace arm {
   class ArmAssembler;
   class Thumb2Assembler;
-}
+}  // namespace arm
 namespace arm64 {
   class Arm64Assembler;
-}
+}  // namespace arm64
 namespace mips {
   class MipsAssembler;
-}
+}  // namespace mips
 namespace mips64 {
   class Mips64Assembler;
-}
+}  // namespace mips64
 namespace x86 {
   class X86Assembler;
   class NearLabel;
-}
+}  // namespace x86
 namespace x86_64 {
   class X86_64Assembler;
   class NearLabel;
-}
+}  // namespace x86_64
 
 class ExternalLabel {
  public:
diff --git a/compiler/utils/managed_register.h b/compiler/utils/managed_register.h
index 184cdf5..2b7b2aa 100644
--- a/compiler/utils/managed_register.h
+++ b/compiler/utils/managed_register.h
@@ -26,24 +26,24 @@
 
 namespace arm {
 class ArmManagedRegister;
-}
+}  // namespace arm
 namespace arm64 {
 class Arm64ManagedRegister;
-}
+}  // namespace arm64
 namespace mips {
 class MipsManagedRegister;
-}
+}  // namespace mips
 namespace mips64 {
 class Mips64ManagedRegister;
-}
+}  // namespace mips64
 
 namespace x86 {
 class X86ManagedRegister;
-}
+}  // namespace x86
 
 namespace x86_64 {
 class X86_64ManagedRegister;
-}
+}  // namespace x86_64
 
 class ManagedRegister : public ValueObject {
  public: