update weex release script

build/get-weex-version.js

@@ -8,6 +8,7 @@ if (weexBaseVersion === coreVersion) {
   weexSubVersion++
 } else {
   // new core version, reset sub version
+  weexBaseVersion = coreVersion
   weexSubVersion = 1
 }
 

build/release-weex.sh

@@ -1,4 +1,3 @@
-# TODO, only release weex package by bumping the weex postfix
 set -e
 CUR_VERSION=`node build/get-weex-version.js -c`
 NEXT_VERSION=`node build/get-weex-version.js`