build: work around missing readlink -f on Mac

Change-Id: I5d56366cf33a2b02f1886c87815d00cff279779d
ota: Build uboot bootable images when necessary

Change-Id: Iefe3509d295f544447817eb71bbb20179c8d74a3
Release Tools: Support for BML, ext2, ext3, vfat and Fix recovery.fstab

BML support for Samsung Legacy Devices
ext2, ext3 and vfat support for EMMC
Fix recovery.fstab for ADV recovery

Change-Id: I6b76d2a21fe68096cf1b0cd850cdfb3a313370d1
Merge "build: work around missing readlink -f on Mac" into android-4.3
build: Rename ota packages from custom to omni.

Change-Id: Idc344f404244cca466770f884dee361f38ea2ebe
Merge "build: Rename ota packages from custom to omni." into android-4.3
Merge branch 'android-4.3' of https://github.com/omnirom/android_build into HEAD