add external_sd directory to ramdisk for mounting external sdcard in cwmr
This addition allows external sdcard mounting in recovery by providing the necessary mountpoint.

Change-Id: Iad32e531d9d35b370645dcf729bc5a70cbf21167
smdk4412-common: add SlimISP_BH camera firmware

Change-Id: Ibf1ec509c4fa4c7302b67d92de1aeeb103efa0d7
Merge remote-tracking branch 'cm/cm-10.1' into jb-4.2