Copy CLDR 36 from unicode.org

These files were exported from the CLDR git repository by running
the following commands:

1. Obtain CLDR 36 sources at /tmp/cldr
$ cd /tmp
$ git clone --branch release-36 --depth 1 https://github.com/unicode-org/cldr.git
$ cd cldr
$ git lfs pull

2. Update CLDR sources in external/cldr
$ rm -rf *
$ cp -r /tmp/cldr/* ./
$ git clean -dfX
$ git add -A .
$ git commit

Bug: 138853239
Test: n/a
Change-Id: If21e955ee9a622eec6d3de5843d29678399d98a7
diff --git a/common/casing/ar.xml b/common/casing/ar.xml
index fa584a5..d13d007 100644
--- a/common/casing/ar.xml
+++ b/common/casing/ar.xml
@@ -6,7 +6,7 @@
 -->
 <ldml>
 	<identity>
-		<version number="$Revision: 11914 $"/>
+		<version number="$Revision$"/>
 		<language type="ar"/>
 	</identity>
 </ldml>