Make ipa_post_processor documentation show up.

--
MOS_MIGRATED_REVID=116595467
diff --git a/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcRuleClasses.java b/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcRuleClasses.java
index c34ffbc..16e4c04 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcRuleClasses.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcRuleClasses.java
@@ -986,7 +986,7 @@
     @Override
     public RuleClass build(Builder builder, RuleDefinitionEnvironment env) {
       return builder
-          /* <!-- #BLAZE_RULE($objc_signing_rule).ATTRIBUTE(ipa_post_processor) -->
+          /* <!-- #BLAZE_RULE($objc_ipa_rule).ATTRIBUTE(ipa_post_processor) -->
           A tool that edits this target's IPA output after it is assembled but before it is
           (optionally) signed.
           <p>