Enable more objc rule attrs to work with --compile_one_dependency

These were (inadvertently?) different than the native rules'
attributes, which worked with --compile_one_dependency.

PiperOrigin-RevId: 463339751
Change-Id: I75d30a899a822a01ba4fb85f2873f9865bedd667

src/main/starlark/builtins_bzl/common/objc/attrs.bzl

@@ -55,8 +55,12 @@ _COMPILING_RULE = {
     ),
     "non_arc_srcs": attr.label_list(
         allow_files = [".m", ".mm"],
+        flags = ["DIRECT_COMPILE_TIME_INPUT"],
+    ),
+    "pch": attr.label(
+        allow_single_file = [".pch"],
+        flags = ["DIRECT_COMPILE_TIME_INPUT"],
     ),
-    "pch": attr.label(allow_single_file = [".pch"]),
     "runtime_deps": attr.label_list(
         providers = [AppleDynamicFrameworkInfo],
         flags = ["DIRECT_COMPILE_TIME_INPUT"],
@@ -73,9 +77,11 @@ _COMPILING_RULE = {
 _COMPILE_DEPENDENCY_RULE = {
     "hdrs": attr.label_list(
         allow_files = True,
+        flags = ["DIRECT_COMPILE_TIME_INPUT"],
     ),
     "textual_hdrs": attr.label_list(
         allow_files = True,
+        flags = ["DIRECT_COMPILE_TIME_INPUT"],
     ),
     "includes": attr.string_list(),
     "sdk_includes": attr.string_list(),