Apply modernize-use-default to clang.

Summary: Replace empty bodies of default constructors and destructors with '= default'.

Reviewers: bkramer, klimek

Subscribers: klimek, alexfh, cfe-commits

Differential Revision: http://reviews.llvm.org/D13890

llvm-svn: 250822
diff --git a/clang/lib/Driver/Tool.cpp b/clang/lib/Driver/Tool.cpp
index 7142e82..6ae3506 100644
--- a/clang/lib/Driver/Tool.cpp
+++ b/clang/lib/Driver/Tool.cpp
@@ -19,5 +19,4 @@
       ResponseSupport(_ResponseSupport), ResponseEncoding(_ResponseEncoding),
       ResponseFlag(_ResponseFlag) {}
 
-Tool::~Tool() {
-}
+Tool::~Tool() = default;