Update Android.mk

Testing to remove this build error:
Import includes file: /home/martin/SchutzhundAOKP/out/target/product/ace/obj/SHARED_LIBRARIES/libOmxCore_intermediates/import_includes
make: *** No rule to make target `/home/martin/SchutzhundAOKP/out/target/product/ace/obj/SHARED_LIBRARIES/libgenlock_intermediates/export_includes', needed by `/home/martin/SchutzhundAOKP/out/target/product/ace/obj/SHARED_LIBRARIES/libOmxVdec_intermediates/import_includes'.  Stop.
make: *** Waiting for unfinished jobs....
Export includes file: hardware/qcom/media/mm-core/Android.mk -- /home/martin/SchutzhundAOKP/out/target/product/ace/obj/SHARED_LIBRARIES/libOmxCore_intermediates/export_includes