20894a478d
In https://reviews.llvm.org/D137982 we found that on Mach-O private aliases could trigger an assert in lld when the aliasee was a weak_def_can_be_hidden symbol. This appears to be incorrect, and should be allowed in Mach-O. Disallowing this behavior is also inconsistent with how ld64 handles a private alias to weak_def_can_be_hidden symbols. This patch removes the assert and tests that LLD handles such aliases gracefully. Reviewed By: #lld-macho, int3 Differential Revision: https://reviews.llvm.org/D141082