releasetools: support more partitions and different fstab types

* add BML support for Samsung legacy devices
* add ext2, ext3 and vfat, f2fs support for EMMC
* fix recovery.fstab for ADV recovery

Change-Id: I6b76d2a21fe68096cf1b0cd850cdfb3a313370d1
build: envsetup: fix OUT_DIR