package version metadata for external/

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Change-Id: I5146c10ad5e4cdc9c410595d74bff3d924e718b8
diff --git a/README.version b/README.version
new file mode 100644
index 0000000..b48b8b7
--- /dev/null
+++ b/README.version
@@ -0,0 +1,3 @@
+URL: https://re2.googlecode.com/files/re2-20130115.tgz
+Version: 20130115
+BugComponent: 14890