fix building errors on Android

3rd party HMAC SHA256 implementation has been added to the driver,
and since driver common code (mmc_cmds.c) includes calling to
routines and data structures that reside in these 3rd party files
(under 3rdparty\hmac_sha) these files should be compiled as well
in Android.mk makefile.

Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>
Signed-off-by: Chris Ball <chris@printf.net>
1 file changed