zry/rust_on_gd32vf103c_start_helloworld_blink: A hello world example for GD32VF103C-START board with rust language. It will make the LED on PA7 blink.

zry 71b588dc90 Initial Commit		%!s(int64=3) %!d(string=hai) anos
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config	71b588dc90 Initial Commit	%!s(int64=3) %!d(string=hai) anos