Fix build.
Fix build.

Convert ota_from_target_files back to symbolic link.

Change-Id: I932ba8c0b15fa71a27083adc92e9f9a90dc82f8c
(cherry picked from commit 17aa06f6fe0c10cb3bb84a11dfc78a88a4155adc)

xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build