debug: add console.log to getPhoneNumber callback

miniprogram/pages/register/register.js

@@ -63,7 +63,10 @@ Page({
 
   onGetPhoneNumber: function (e) {
     var self = this
+    console.log('[register] getPhoneNumber detail:', JSON.stringify(e.detail))
     if (!e.detail || !e.detail.code) {
+      var errMsg = (e.detail && e.detail.errMsg) || ''
+      console.log('[register] getPhoneNumber failed:', errMsg)
       wx.showToast({ title: '手机号授权未成功，可跳过此步骤', icon: 'none' })
       return
     }