Working ASLR implementation.

ASLR for shared libraries is controlled by "-a" in ota_from_target_files.
Binary files are self-contained (supported by apriori/soslim).

Signed-off-by: Hristo Bojinov <hristo@google.com>
Change-Id: I500e325bf4a70a8d69a2ab9b2938e83dadb4e65d