Sync with RT-Thread/rt-thread@de6d7ec (4.1.0)

Fix GCC 4.x compilation error

Add user commands support

Basic STM32 architecture support

Add GD32V platform (Bumblebee, RV32IMAC) support

ILI9341 driver done

Add IIC and FT6206 drivers

Add mo config

Add dynamic linker module (disabled by default)

Enable uLog