[lldb-vsocde] Cleaning up the usage of the Separate helper in Options.td.

[wallace]

wooo

lldb/tools/lldb-vscode/Options.td

def: Flag<["-"], "h">,
   HelpText<"Alias for --help">;
 
 def wait_for_debugger: F<"wait-for-debugger">,
   HelpText<"Pause the program at startup.">;
 def: Flag<["-"], "g">,
   Alias<wait_for_debugger>,
   HelpText<"Alias for --wait-for-debugger">;
 
-def port: Separate<["--", "-"], "port">,
+def port: S<"port">,
   MetaVarName<"<port>">,
   HelpText<"Communicate with the lldb-vscode tool over the defined port.">;
 def: Separate<["-"], "p">,
   Alias<port>,
   HelpText<"Alias for --port">;
 
-def launch_target: Separate<["--", "-"], "launch-target">,
+def launch_target: S<"launch-target">,
   MetaVarName<"<target>">,
   HelpText<"Launch a target for the launchInTerminal request. Any argument "
     "provided after this one will be passed to the target. The parameter "
     "--comm-file must also be specified.">;
 
-def comm_file: Separate<["--", "-"], "comm-file">,
+def comm_file: S<"comm-file">,
   MetaVarName<"<file>">,
   HelpText<"The fifo file used to communicate the with the debug adaptor "
     "when using --launch-target.">;
 
-def debugger_pid: Separate<["--", "-"], "debugger-pid">,
+def debugger_pid: S<"debugger-pid">,
   MetaVarName<"<pid>">,
   HelpText<"The PID of the lldb-vscode instance that sent the launchInTerminal "
     "request when using --launch-target.">;
 
 def repl_mode: S<"repl-mode">,
   MetaVarName<"<mode>">,
   HelpText<"The mode for handling repl evaluation requests, supported modes: variable, command, auto.">;