tiny210 hal 3 硬件抽象层增加接口模块访问硬件驱动程序

refer to 在Android硬件抽象层增加接口模块访问硬件驱动程序

在硬件抽象层中添加访问驱动程序的代码
hardware/libhardware/include/hardware/hello.h
hardware/libhardware/modules/hello/hello.c
hello.c负责直接与驱动打交道，比如open，read等

输出
out/target/product/smdkv210/system/lib/hw/hello.default.so

在tiny210下的system/lib/hw/已经有很多硬件抽象层so了

/ # ls system/lib/hw/sensors.mini210.sogralloc.default.sogps.goldfish.sooverlay.s5pc110.solights.s5pc110.socopybit.s5pc110.solights.mini210.sosensors.goldfish.sogps.mini210.so