应用图标路径从unpackage目录调整到package目录

(cherry picked from commit 7f6caf2a)

.gitignore

 node_modules/
 .project
-/unpackage/*
-!/unpackage/icon1024.png
+unpackage/
 .DS_Store
 .hbuilderx/
 __image_snapshots__/

manifest.json

@@ -47,7 +47,11 @@
       },
       "icons" : {
         "ios" : {
-          "appstore" : "unpackage/icon1024.png"
+          "appstore" : "package/icon1024.png"
+        },
+        "android" : {
+          "xxhdpi" : "package/icon144.png",
+          "xxxhdpi" : "package/icon192.png"
         }
       }
     }