package version metadata for external/

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Change-Id: Iac227e65348e7f28345a7fca019355d8976788b2
diff --git a/README.version b/README.version
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+URL: http://archive.apache.org/dist/ant/source/apache-ant-1.8.3-src.tar.gz
+Version: 1.8.3
+BugComponent: 99142