Fixup so build_cleaner works with rules_java macros

PiperOrigin-RevId: 461046521
Change-Id: I43e93cd9d9683e657bff5bc24bba7aec97ad1655

java/defs.bzl

diff --git a/java/defs.bzl b/java/defs.bzl
index e7308e0..feedf52 100644
--- a/java/defs.bzl
+++ b/java/defs.bzl
@@ -13,6 +13,8 @@
 # limitations under the License.
 """Starlark rules for building Java projects."""
 
+# Do not touch: This line marks the end of loads; needed for PR importing.
+
 _MIGRATION_TAG = "__JAVA_RULES_MIGRATION_DO_NOT_USE_WILL_BREAK__"
 version = "5.0.0"