[rebranch][lldb] Add missing dump to TypeSystemSwift

9a57d1e added a
`dump(llvm::raw_ostream)` to `TypeSsystem`. Implement in
`TypeSystemSwift.

Author: bnbarham

lldb/source/Plugins/TypeSystem/Swift/TypeSystemSwift.cpp

@@ -79,6 +79,10 @@ void TypeSystemSwift::DumpValue(
     uint32_t bitfield_bit_offset, bool show_types, bool show_summary,
     bool verbose, uint32_t depth) {}
 
+void TypeSystemSwift::Dump(llvm::raw_ostream &output) {
+  // TODO: What to dump?
+}
+
 bool TypeSystemSwift::IsFloatingPointType(opaque_compiler_type_t type,
                                           uint32_t &count, bool &is_complex) {
   count = 0;

lldb/source/Plugins/TypeSystem/Swift/TypeSystemSwift.h

@@ -169,6 +169,9 @@ class TypeSystemSwift : public TypeSystem {
                  bool show_types, bool show_summary, bool verbose,
                  uint32_t depth) override;
 
+  /// \see lldb_private::TypeSystem::Dump
+  void Dump(llvm::raw_ostream &output) override;
+
   /// Unavailable hardcoded functions that don't make sense for Swift.
   /// \{
   ConstString DeclContextGetName(void *opaque_decl_ctx) override { return {}; }