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 '())))))

depends/packages/native_llvm.mk

@@ -17,6 +17,7 @@ define $(package)_stage_cmds
   cp bin/clang $($(package)_staging_prefix_dir)/bin/ && \
   cp -P bin/clang++ $($(package)_staging_prefix_dir)/bin/ && \
   cp bin/dsymutil $($(package)_staging_prefix_dir)/bin/dsymutil && \
+  cp bin/ld64.lld $($(package)_staging_prefix_dir)/bin/ld64.lld && \
   cp bin/llvm-ar $($(package)_staging_prefix_dir)/bin/llvm-ar && \
   cp bin/llvm-config $($(package)_staging_prefix_dir)/bin/ && \
   cp bin/llvm-nm $($(package)_staging_prefix_dir)/bin/llvm-nm && \