avrgcc: 7.3.0 -> 8.1.0

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/avr-gcc/versions.

These checks were done:

- built on NixOS
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-g++ --help’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-c++ --help’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-gcc --help’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-gcc-8.1.0 --help’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-gcov -h’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-gcov --help’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-gcov help’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-gcov-tool -h’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-gcov-tool --help’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-gcov-dump -h’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-gcov-dump --help’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-gcov-dump help’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-cpp --help’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-gcc-ar -h’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-gcc-ar --help’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-gcc-nm -h’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-gcc-nm --help’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-gcc-ranlib -h’ got 0 exit code
- ran ‘/nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0/bin/avr-gcc-ranlib --help’ got 0 exit code
- found 8.1.0 with grep in /nix/store/kj1gijncvyaz6a0v4fg78420i9xrhzg2-avr-gcc-8.1.0
- directory tree listing: https://gist.github.com/bc5f032e2fae6d464814f0d61feb07dd