Added missing include caught by the build bot.

src/CppParser/Parser.cpp

@@ -20,6 +20,7 @@
 #include <clang/AST/ASTContext.h>
 #include <clang/AST/Comment.h>
 #include <clang/AST/DeclTemplate.h>
+#include <clang/AST/ExprCXX.h>
 #include <clang/Lex/DirectoryLookup.h>
 #include <clang/Lex/HeaderSearch.h>
 #include <clang/Lex/Preprocessor.h>