[clang] Fixing windows buildbot after D61552

Summary:
original review : https://reviews.llvm.org/D61552

build bot faillure : http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast/builds/110

this adds a missing definition of cxxDeductionGuideDecl.
surprisingly it was still working on linux with out it.

Reviewers: aaron.ballman

Differential Revision: https://reviews.llvm.org/D63592

llvm-svn: 363919

clang/lib/ASTMatchers/ASTMatchersInternal.cpp

@@ -603,6 +603,8 @@ const internal::VariadicDynCastAllOfMatcher<Decl, EnumConstantDecl>
 const internal::VariadicDynCastAllOfMatcher<Decl, CXXMethodDecl> cxxMethodDecl;
 const internal::VariadicDynCastAllOfMatcher<Decl, CXXConversionDecl>
     cxxConversionDecl;
+const internal::VariadicDynCastAllOfMatcher<Decl, CXXDeductionGuideDecl>
+    cxxDeductionGuideDecl;
 const internal::VariadicDynCastAllOfMatcher<Decl, VarDecl> varDecl;
 const internal::VariadicDynCastAllOfMatcher<Decl, FieldDecl> fieldDecl;
 const internal::VariadicDynCastAllOfMatcher<Decl, IndirectFieldDecl>