package version metadata for external/

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Change-Id: I7923ad97d3569d7ef02a11d896b9b74ce1ac8ac3
diff --git a/README.version b/README.version
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--- /dev/null
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+URL: http://www.infradead.org/~tgr/libnl/files/libnl-2.0.tar.gz
+Version: 2.0
+BugComponent: 99150