Add missing closing namespace comment.

llvm-svn: 215402
diff --git a/llvm/lib/Target/AArch64/AArch64LoadStoreOptimizer.cpp b/llvm/lib/Target/AArch64/AArch64LoadStoreOptimizer.cpp
index 31eb3a2..8157981 100644
--- a/llvm/lib/Target/AArch64/AArch64LoadStoreOptimizer.cpp
+++ b/llvm/lib/Target/AArch64/AArch64LoadStoreOptimizer.cpp
@@ -109,7 +109,7 @@
   int getMemSize(MachineInstr *MemMI);
 };
 char AArch64LoadStoreOpt::ID = 0;
-}
+} // namespace
 
 static bool isUnscaledLdst(unsigned Opc) {
   switch (Opc) {