[utestcases] add dependence RT_USING_UTESTCASES
[utestcases] add dependence RT_USING_UTESTCASES

RT-Thread/rt-thread,nongxiaoming/rt-thread,hezlog/rt-thread,RT-Thread/rt-thread,nongxiaoming/rt-thread,hezlog/rt-thread,RT-Thread/rt-thread,nongxiaoming/rt-thread,RT-Thread/rt-thread,hezlog/rt-thread,RT-Thread/rt-thread,RT-Thread/rt-thread,hezlog/rt-thread,nongxiaoming/rt-thread,hezlog/rt-thread,nongxiaoming/rt-thread,nongxiaoming/rt-thread,hezlog/rt-thread,nongxiaoming/rt-thread,RT-Thread/rt-thread,hezlog/rt-thread