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/Frontend/MultiplexConsumer.cpp b/clang/lib/Frontend/MultiplexConsumer.cpp
index 91ee100..226e33d 100644
--- a/clang/lib/Frontend/MultiplexConsumer.cpp
+++ b/clang/lib/Frontend/MultiplexConsumer.cpp
@@ -262,7 +262,7 @@
   }
 }
 
-MultiplexConsumer::~MultiplexConsumer() {}
+MultiplexConsumer::~MultiplexConsumer() = default;
 
 void MultiplexConsumer::Initialize(ASTContext &Context) {
   for (auto &Consumer : Consumers)