msm: Makefile: Add build support for MSMZINC

Add the Makefile entries necessary to support the MSMZINC
target.

Change-Id: I9ec9c53b567c840755616683e86a1b9c0eeeab1f
Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>
2 files changed