Collect data from objc_import (#2346)

@keith, tossing up a quick PR per your suggestion in
bazelbuild/bazel#17018 (comment)
to lay the groundwork

apple/internal/aspects/resource_aspect.bzl

@@ -139,6 +139,9 @@ def _apple_resource_aspect_impl(target, ctx):
         if ctx.rule.attr.srcs or ctx.rule.attr.non_arc_srcs or ctx.rule.attr.deps:
             owner = str(ctx.label)
 
+    elif ctx.rule.kind == "objc_import":
+        collect_args["res_attrs"] = ["data"]
+
     elif ctx.rule.kind == "swift_library":
         module_names = [x.name for x in target[SwiftInfo].direct_modules if x.swift]
         bucketize_args["swift_module"] = module_names[0] if module_names else None