nrf52最新的SDK17.1与最新的SES不兼容，记录一下需要修改example中的哪些内容

unknown type name '__printf_tag_ptr'
1. Project->Options and then select Code->Library. For "library I/O" select RTT
2. #define RETARGET_ENABLED 0 in the sdk_config.h file

__vfprintf.h: No such file or directory
remove the SEGGER_RTT_Syscalls_SES.c file

.text section is larger than specified size
1. right clicking in the left tab Project and selecting "Import Section Placement". The file "flash_placement.xml" then appeared under "System Files" in the file tree.
2. removed the `size="0x4"`  strings from the file