msm8660: add sdcards for recovery

  * this gets the sdcards working in recovery (/sdcard and /external_sd)
  * temporary until we get vold running

Change-Id: I22a178229424c4fea4a0eabbfb696ecf5194fc5f
Merge branch 'cm-10.2' of https://github.com/CyanogenMod/android_device_samsung_msm8660-common into jb43