Add README.version.

Change-Id: I3c60a28841597b325186442500fa1b352ed61d9c
diff --git a/README.version b/README.version
new file mode 100644
index 0000000..ec7580e
--- /dev/null
+++ b/README.version
@@ -0,0 +1,4 @@
+URL: http://llvm.org/git/libcxx.git
+Version: ba865ff66b36f99a1dc5d9e31af3d8943f94e349
+BugComponent: 117395
+Owners: danalbert, srhines, android-llvm