Fixed/added namespace ending comments using clang-tidy. NFC

The patch is generated using this command:

tools/clang/tools/extra/clang-tidy/tool/run-clang-tidy.py -fix \
  -checks=-*,llvm-namespace-comment -header-filter='llvm/.*|clang/.*' \
  llvm/lib/


Thanks to Eugene Kosov for the original patch!



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240137 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/Reassociate.cpp

@@ -154,7 +154,7 @@ namespace {
     unsigned SymbolicRank;
     bool isOr;
   };
-}
+} // namespace
 
 namespace {
   class Reassociate : public FunctionPass {
@@ -197,7 +197,7 @@ namespace {
     void OptimizeInst(Instruction *I);
     Instruction *canonicalizeNegConstExpr(Instruction *I);
   };
-}
+} // namespace
 
 XorOpnd::XorOpnd(Value *V) {
   assert(!isa<ConstantInt>(V) && "No ConstantInt");