[clang][ASTMatchers] Add definition for cxxDeductionGuideDecl introduced in rL363855
[clang][ASTMatchers] Add definition for cxxDeductionGuideDecl introduced in rL363855

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@363917 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang