error out on /LIB and /DUMP switches

src/linker/lnk_config.h

@@ -20,6 +20,7 @@ typedef enum
   LNK_CmdSwitch_DelayLoad,
   LNK_CmdSwitch_Dll,
   LNK_CmdSwitch_DynamicBase,
+  LNK_CmdSwitch_Dump,
   LNK_CmdSwitch_Entry,
   LNK_CmdSwitch_Export,
   LNK_CmdSwitch_FastFail,
@@ -33,6 +34,7 @@ typedef enum
   LNK_CmdSwitch_Include,
   LNK_CmdSwitch_Incremental,
   LNK_CmdSwitch_LargeAddressAware,
+  LNK_CmdSwitch_Lib,
   LNK_CmdSwitch_LibPath,
   LNK_CmdSwitch_Machine,
   LNK_CmdSwitch_Manifest,