Fix required fragments for Bazel j2objc_library rule.

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MOS_MIGRATED_REVID=101777944

src/main/java/com/google/devtools/build/lib/bazel/rules/objc/BazelJ2ObjcLibraryRule.java

diff --git a/src/main/java/com/google/devtools/build/lib/bazel/rules/objc/BazelJ2ObjcLibraryRule.java b/src/main/java/com/google/devtools/build/lib/bazel/rules/objc/BazelJ2ObjcLibraryRule.java
index 86c2355..0a73475 100644
--- a/src/main/java/com/google/devtools/build/lib/bazel/rules/objc/BazelJ2ObjcLibraryRule.java
+++ b/src/main/java/com/google/devtools/build/lib/bazel/rules/objc/BazelJ2ObjcLibraryRule.java
@@ -21,9 +21,11 @@
 import com.google.devtools.build.lib.analysis.RuleDefinitionEnvironment;
 import com.google.devtools.build.lib.packages.RuleClass;
 import com.google.devtools.build.lib.packages.RuleClass.Builder;
+import com.google.devtools.build.lib.rules.java.J2ObjcConfiguration;
 import com.google.devtools.build.lib.rules.objc.J2ObjcAspect;
 import com.google.devtools.build.lib.rules.objc.J2ObjcLibrary;
 import com.google.devtools.build.lib.rules.objc.J2ObjcLibraryBaseRule;
+import com.google.devtools.build.lib.rules.objc.ObjcConfiguration;
 
 /**
  * Concrete implementation of J2ObjCLibraryBaseRule.
@@ -33,6 +35,7 @@
   @Override
   public RuleClass build(Builder builder, RuleDefinitionEnvironment env) {
     return builder
+        .requiresConfigurationFragments(J2ObjcConfiguration.class, ObjcConfiguration.class)
           /* <!-- #BLAZE_RULE(j2objc_library).ATTRIBUTE(deps) -->
           A list of <code>j2objc_library</code>, <code>java_library</code>
           and <code>java_import</code> targets that contain