[jsfm] upgrade js framework to v0.27.2 (apache#1388)

Author: imyzf

android/sdk/assets/weex-main-jsfm.js

@@ -2,7 +2,7 @@
   "name": "weex",
   "version": "0.12.2",
   "subversion": {
-    "framework": "0.27.1",
+    "framework": "0.27.2",
     "transformer": ">=0.1.5 <0.5"
   },
   "description": "A framework for building Mobile cross-platform UI",