ELF: Add -Qy as ignored option

GCC passes it by default on powerpc64 on FreeBSD. GNU ld claims "this
option is ignored for SVR4 compatibility", so we can ignore it too.

Differential Revision:	https://reviews.llvm.org/D24313

llvm-svn: 280864

lld/ELF/Options.td

@@ -277,6 +277,7 @@ def warn_shared_textrel: F<"warn-shared-textrel">;
 def EB : F<"EB">;
 def EL : F<"EL">;
 def G: JoinedOrSeparate<["-"], "G">;
+def Qy : F<"Qy">;
 
 // Aliases for ignored options
 def alias_define_common_d: Flag<["-"], "d">, Alias<define_common>;