AndroidKernel: Add the makefile required to build Android

The makefile invoked by the Android build system is now added to the
kernel tree.

CRs-Fixed: 2013720
Change-Id: I1613049a68f8f0f8b20979853fbc366d2c955db8
Signed-off-by: Ameya Thakur <ameyat@codeaurora.org>
Signed-off-by: Bhargav Gurappadi <bhargavg1@codeaurora.org>
Signed-off-by: Bruce Levy <blevy@codeaurora.org>