macho: set CS_LINKER_SIGNED flag in code signature generated by zld
This way, if the user wants to use `codesign` (or other tool) they
will not be forced to `-f` force signature update. This matches
the behavior promoted by Apple's `ld64` linker.
8b5d5f44e2Jakub Konka committed on 4/1/2022, 12:33:37 PMparentfd29ddc