Update CodeMirror to latest HEAD

Change-Id: Ib2add9e94abf28fdb70cd00f5b05529ba5b20c41
diff --git a/lib/codemirror/BUCK b/lib/codemirror/BUCK
index 8381413..38537b3 100644
--- a/lib/codemirror/BUCK
+++ b/lib/codemirror/BUCK
@@ -1,7 +1,7 @@
 include_defs('//lib/maven.defs')
 
-VERSION = '4f85a7ef97'
-SHA1 = 'd938d231af84546cf90cd2bcfe31c531d303f8b4'
+VERSION = '7f560afa1c'
+SHA1 = 'c6590239987d2cfffa79abe90f0cbf4718011349'
 URL = GERRIT + 'net/codemirror/codemirror-%s.zip' % VERSION
 
 prebuilt_jar(