[ELF2] - added ignored command line options for compatibility

[grimar]

Summary

Just added few ignored options.

[davide]

LGTM. Please remove the whitespace changes from this patch, and commit them separately.

[grimar]

Removed whitespace changes from patch.

[grimar]

In D13097#251774, @davide wrote:

LGTM. Please remove the whitespace changes from this patch, and commit them separately.

Unfortunately I dont have write permissions yet.

[grimar]

Thanks, Davide !

lld/trunk/ELF/Options.td

def alias_discard_all: Flag<["-"], "x">,
      Alias<discard_all>;
 
 def discard_locals : Flag<["-"], "discard-locals">,
      HelpText<"Delete temporary local symbols">;
 
 def alias_discard_locals: Flag<["-"], "X">,
      Alias<discard_locals>;
 
+//===----------------------------------------------------------------------===//
+/// Ignored options
+//===----------------------------------------------------------------------===//
+
+def dashg : Flag<["-"], "g">,
+     HelpText<"Ignored.">;
+
+def Qy : Flag<["-"], "Qy">,
+     HelpText<"Ignored for SVR4 Compatibility">;
+
+def qmagic : Flag<["-"], "qmagic">,
+     HelpText<"Ignored for Linux Compatibility">;
+
+def sunassert : Flag<["-"], "assert">,
+     HelpText<"Ignored for SunOS Compatibility">;
+
 def export_dynamic : Flag<["--"], "export-dynamic">,
      HelpText<"Put symbols in the dynamic symbol table">;