i9300: recovery: auto detect fstype for sdcard

Change-Id: I3a4e7f914093b64ec5f6b46d46e1f9cde74f0037
Merge remote-tracking branch 'upstream/cm-10.1' into cm-10.1
Merge branch 'cm-10.1' of github.com:CyanogenMod/android_device_samsung_i9300 into cm-10.1
Merge remote-tracking branch 'upstream/cm-10.1' into cm-10.1