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
msm8660: Use "auto" for sdcard mounts

 * We'll soon have support for vold in recovery, so other filesystems
   such as exfat and ext4 will be supported.

Change-Id: I6d87bc53b04f3deba93136e92f5894f18604e9ce
Merge branch 'cm-10.2' of github.com:CyanogenMod/android_device_samsung_msm8660-common into cm-10.2