build: Enable QCOM_BSP, QC_AV with QCOM_HARDWARE

Change-Id: Ibf9dd35272521109fea52e46bacf6e1e3074ed6a
add support for extended prop post processing

Change-Id: If754dd2349eb376a536d3858b4263883d3b1a920
Build: Small workaround

  * Until the real problem is solved lets unmount partions prior to flash
  * Based on Vonnegut@XDA recommendation

Change-Id: If2ec54f5e273f1c92868672ed365f246ace54b70
Signed-off-by: Josue Rivera <prbassplayer@gmail.com>