fix linkage for frida-gum script example for macos

[jejuisland87654]

fix error when building examples/gum/script:

= note: Undefined symbols for architecture arm64:
            "_res_9_dn_expand", referenced from:
                _OUTLINED_FUNCTION_16 in libfrida_gum_sys-75fd3f9127f13c0d.rlib[1357](gthreadedresolver.c.o)
            "_res_9_ndestroy", referenced from:
                _do_lookup_records in libfrida_gum_sys-75fd3f9127f13c0d.rlib[1357](gthreadedresolver.c.o)
            "_res_9_ninit", referenced from:
                _do_lookup_records in libfrida_gum_sys-75fd3f9127f13c0d.rlib[1357](gthreadedresolver.c.o)
            "_res_9_nquery", referenced from:
                _do_lookup_records in libfrida_gum_sys-75fd3f9127f13c0d.rlib[1357](gthreadedresolver.c.o)
          ld: symbol(s) not found for architecture arm64
          clang: error: linker command failed with exit code 1 (use -v to see invocation)

[s1341]

You need to format.

[jejuisland87654]

formatted now