t-base-301B: fix bug TD-471 on generating a better buffer handle for mmap error on Android L

Change-Id: I4c9710d88054df7367e2fa2f76b33d0b25a4b5ed
Signed-off-by: Oana Medvesan <medvesan.oana@gmail.com>
Git-commit: 2a58937b884bb42e681ea2bc5db149f71b3457ae
Git-repo: https://code.google.com/p/tee-mobicore-driver.kernel/


Signed-off-by: Keith Fallows <keithf@codeaurora.org>
Acked-by: Tony Hamilton <tonyh@qti.qualcomm.com>