Fix a tiny bug in alias handling.

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MOS_MIGRATED_REVID=131379356

src/main/java/com/google/devtools/build/lib/analysis/RuleContext.java

diff --git a/src/main/java/com/google/devtools/build/lib/analysis/RuleContext.java b/src/main/java/com/google/devtools/build/lib/analysis/RuleContext.java
index a829195..11d2730 100644
--- a/src/main/java/com/google/devtools/build/lib/analysis/RuleContext.java
+++ b/src/main/java/com/google/devtools/build/lib/analysis/RuleContext.java
@@ -1540,7 +1540,7 @@
         String attributeName = attr.getName();
         Map<Label, ConfiguredTarget> ctMap = new HashMap<>();
         for (ConfiguredTarget prerequisite : prerequisiteMap.get(attr)) {
-          ctMap.put(prerequisite.getLabel(), prerequisite);
+          ctMap.put(AliasProvider.getDependencyLabel(prerequisite), prerequisite);
         }
         List<FilesetEntry> entries = ConfiguredAttributeMapper.of(rule, configConditions)
             .get(attributeName, BuildType.FILESET_ENTRY_LIST);