`-no_dead_strip` cannot be recognized by ld on osx

[csmoe]

rust/compiler/rustc_codegen_ssa/src/back/linker.rs

Lines 569 to 570 in 4d6d601

	if self.sess.target.is_like_osx {
	self.linker_arg("-no_dead_strip");

The linker failed with

ld: unknown option: -no_dead_strip