Buck: Fix non obfuscated CodeMirror fetching

I36b4c29e2 introduced a typo in group id for non obfuscated CodeMirror
distribution.

Change-Id: If4f396d314fb7a6e689d3389676a5c73252a88b3
Reported-By: Marco Miller <marco.miller@ericsson.com>
diff --git a/lib/codemirror/BUCK b/lib/codemirror/BUCK
index 2252eb92..8c2b322 100644
--- a/lib/codemirror/BUCK
+++ b/lib/codemirror/BUCK
@@ -16,7 +16,7 @@
 
 maven_jar(
   name = 'codemirror-original',
-  id = 'org.webjars.npm:codemirror:' + VERSION,
+  id = 'org.webjars:codemirror:' + VERSION,
   sha1 = '4a26f060aeca679fdf751d2b480499c8a5f71e47',
   attach_source = False,
   license = 'codemirror-original',