[lld] Ignore --no-add-needed

[alxu]

Summary

It is the original version of --no-copy-dt-needed-entries. Some programs unfortunately use it without checking.

[alxu]

https://github.com/llvm/llvm-project/commit/c29c19cb5327624dd31fcb776f8fbe66ca1011bb discussed with @MaskRay on IRC

lld/ELF/Options.td

 // This may be either an unhandled LLVMgold.so feature or GCC passed
 // -plugin-opt=path/to/{liblto_plugin.so,lto-wrapper}
 def plugin_opt_eq : J<"plugin-opt=">;
 
 // Options listed below are silently ignored for now for compatibility.
 def: F<"detect-odr-violations">;
 def: Flag<["-"], "g">;
 def: F<"long-plt">;
+def: F<"no-add-needed">;
 def: F<"no-copy-dt-needed-entries">;
 def: F<"no-ctors-in-init-array">;
 def: F<"no-keep-memory">;
 def: F<"no-warn-mismatch">;
 def: Separate<["--", "-"], "rpath-link">;
 def: J<"rpath-link=">;
 def: F<"secure-plt">;
 def: F<"sort-common">;

lld/test/ELF/silent-ignore.test

 RUN: ld.lld --version \
 RUN:   -detect-odr-violations \
 RUN:   -g \
 RUN:   -long-plt \
+RUN:   -no-add-needed \
 RUN:   -no-copy-dt-needed-entries \
 RUN:   -no-ctors-in-init-array \
 RUN:   -no-keep-memory \
 RUN:   --no-relax \
 RUN:   -no-warn-mismatch \
 RUN:   -rpath-link . \
 RUN:   -secure-plt \
 RUN:   -sort-common \
 RUN:   -stats \
 RUN:   -warn-execstack \
 RUN:   -warn-once \
 RUN:   -warn-shared-textrel \
 RUN:   -EB \
 RUN:   -EL \
 RUN:   -G 0
 RUN: not ld.lld --version --not-an-ignored-argument