Fix parameter name comments using clang-tidy. NFC.

This patch applies clang-tidy's bugprone-argument-comment tool
to LLVM, clang and lld source trees. Here is how I created this
patch:

$ git clone https://github.com/llvm/llvm-project.git
$ cd llvm-project
$ mkdir build
$ cd build
$ cmake -GNinja -DCMAKE_BUILD_TYPE=Debug \
    -DLLVM_ENABLE_PROJECTS='clang;lld;clang-tools-extra' \
    -DCMAKE_EXPORT_COMPILE_COMMANDS=On -DLLVM_ENABLE_LLD=On \
    -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ ../llvm
$ ninja
$ parallel clang-tidy -checks='-*,bugprone-argument-comment' \
    -config='{CheckOptions: [{key: StrictMode, value: 1}]}' -fix \
    ::: ../llvm/lib/**/*.{cpp,h} ../clang/lib/**/*.{cpp,h} ../lld/**/*.{cpp,h}

llvm-svn: 366177
diff --git a/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp b/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
index 170149d..bd091ee 100644
--- a/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
+++ b/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
@@ -2428,7 +2428,7 @@
   assert(!argT.isNull() && "Can't find 'SEL' type");
   ArgTys.push_back(argT);
   QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
-                                               ArgTys, /*isVariadic=*/true);
+                                               ArgTys, /*variadic=*/true);
   MsgSendFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
                                              SourceLocation(),
                                              SourceLocation(),
@@ -2442,7 +2442,7 @@
   SmallVector<QualType, 2> ArgTys;
   ArgTys.push_back(Context->VoidTy);
   QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
-                                               ArgTys, /*isVariadic=*/true);
+                                               ArgTys, /*variadic=*/true);
   MsgSendSuperFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
                                                   SourceLocation(),
                                                   SourceLocation(),
@@ -2461,7 +2461,7 @@
   assert(!argT.isNull() && "Can't find 'SEL' type");
   ArgTys.push_back(argT);
   QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
-                                               ArgTys, /*isVariadic=*/true);
+                                               ArgTys, /*variadic=*/true);
   MsgSendStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
                                                   SourceLocation(),
                                                   SourceLocation(),
@@ -2477,7 +2477,7 @@
   SmallVector<QualType, 2> ArgTys;
   ArgTys.push_back(Context->VoidTy);
   QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
-                                               ArgTys, /*isVariadic=*/true);
+                                               ArgTys, /*variadic=*/true);
   MsgSendSuperStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
                                                        SourceLocation(),
                                                        SourceLocation(),
@@ -2497,7 +2497,7 @@
   assert(!argT.isNull() && "Can't find 'SEL' type");
   ArgTys.push_back(argT);
   QualType msgSendType = getSimpleFunctionType(Context->DoubleTy,
-                                               ArgTys, /*isVariadic=*/true);
+                                               ArgTys, /*variadic=*/true);
   MsgSendFpretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
                                                   SourceLocation(),
                                                   SourceLocation(),