Roll-back r250822.

Summary: It breaks the build for the ASTMatchers

Subscribers: klimek, cfe-commits

Differential Revision: http://reviews.llvm.org/D13893

llvm-svn: 250827
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index b5ac599..6e23411 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -59,7 +59,7 @@
     HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
     PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
 
-CompilerInvocationBase::~CompilerInvocationBase() = default;
+CompilerInvocationBase::~CompilerInvocationBase() {}
 
 //===----------------------------------------------------------------------===//
 // Deserialization (from args)