ICU-3191 Add CS country code with a comment

X-SVN-Rev: 13534

icu4c/source/data/locales/en.txt

@@ -59,6 +59,7 @@ en {
         CN { "China" }
         CO { "Colombia" }
         CR { "Costa Rica" }
+        //CS { "Serbia and Montenegro" } // TODO: if we allow this, then SP must go away
         CU { "Cuba" }
         CV { "Cape Verde" }
         CX { "Christmas Island" }

icu4c/source/data/locales/root.txt

@@ -126,6 +126,7 @@ root {
         CN { "CN" }
         CO { "CO" }
         CR { "CR" }
+        //CS { "CS" } // TODO: if we allow this, then SP must go away
         CU { "CU" }
         CV { "CV" }
         CX { "CX" }