init 5.10_rt with nkio nkmcu

hc

2023-12-06 d38611ca164021d018c1b23eee65bbebc09c63e0

prebuilts/gcc/linux-x86/aarch64/gcc-arm-10.3-2021.07-x86_64-aarch64-none-linux-gnu/aarch64-none-linux-gnu/lib64/libstdc++.a does not exist in tree 698deec1dcef1107b2906cd50500fbf876b19ea4