message: Fix the lldb_private::Function::GetDescription to print out the name and mangled name correctly. Previously this was getting the function type's name which was not correct.
  This info appears in the output of "image lookup --verbose --address ADDRESS".
diff: @@ -228,12 +228,15 @@ const CompileUnit *Function::GetCompileUnit() const { return m_comp_unit; }
  void Function::GetDescription(Stream *s, lldb::DescriptionLevel level,
  Target *target) {
  - Type *func_type = GetType();
  - const char *name = func_type ? func_type->GetName().AsCString() : "<unknown>";
  -
  - *s << "id = " << (const UserID &)*this << ", name = \"" << name
  - << "\", range = ";
  -
  + ConstString name = GetName();
  + ConstString mangled = m_mangled.GetMangledName();
  +
  + *s << "id = " << (const UserID &)*this;
  + if (name)
  + *s << ", name = \"" << name.GetCString() << '"';
  + if (mangled)
  + *s << ", mangled = \"" << mangled.GetCString() << '"';
  + *s << ", range = ";
  Address::DumpStyle fallback_style;
  if (level == eDescriptionLevelVerbose)
  fallback_style = Address::DumpStyleModuleWithFileAddress;
  