1. add new shell command: reg_ape to print the timer task info;
2. update the function of osp_timer_sync;
3. add new testcase of case1 to test the timer(t_offset < 10)
4. Test:
4.1 spu_case0_arm_case0: Pass;
4.2 spu_case1_arm_case20: Pass;
4.3 spu_case14_arm_case20:Pass;
4.4 spu_case20_arm_case20:Pass;
4.5 spu_case24_arm_case24:Pass;
4.6 spu_case34_arm_case5: Pass;
4.7 spu_case44_arm_case5: Pass;
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