build: add lld into macOS build environment(s)

contrib/guix/manifest.scm

@@ -534,6 +534,8 @@ inspecting signatures in Mach-O binaries.")
                  gcc-toolchain-11
                  binutils
                  clang-toolchain-17
+                 lld-17
+                 (make-lld-wrapper lld-17 #:lld-as-ld? #t)
                  python-signapple
                  zip))
           (else '())))))