Register linkageSpecDecl matcher

Summary:
This allows `linkageSpecDecl` to be used from `clang-query`.

See also D31869 which similary adds `isStaticStorageClass`.

Reviewers: aaron.ballman

Reviewed By: aaron.ballman

Subscribers: cfe-commits, klimek

Differential Revision: https://reviews.llvm.org/D37346

llvm-svn: 312283

clang/lib/ASTMatchers/Dynamic/Registry.cpp

@@ -355,6 +355,7 @@ RegistryMaps::RegistryMaps() {
   REGISTER_MATCHER(labelDecl);
   REGISTER_MATCHER(labelStmt);
   REGISTER_MATCHER(lambdaExpr);
+  REGISTER_MATCHER(linkageSpecDecl);
   REGISTER_MATCHER(lValueReferenceType);
   REGISTER_MATCHER(matchesName);
   REGISTER_MATCHER(matchesSelector);