Modify the file main.cpp for M487

History

main.cpp adds the setting of TARGET_NUMAKER_PFM_M487 for M487 default tip

2017-09-29, by shliu1 [Fri, 29 Sep 2017 05:44:02 +0000] rev 0

main.cpp adds the setting of TARGET_NUMAKER_PFM_M487 for M487