Move license files out of /usr/local/bin

[tdemin]

See Filesystem Hierarchy Standard. Those files should reside at /usr/local/share/git-license-generator or something alike.

[aligoren]

Okay. I'll check it :) I'll fix :)

[yahsieh]

Or maybe get the license files from GitHub, like:
wget -O LICENSE.md https://raw.githubusercontent.com/foss-dev/git-license-generator/master/git-licenses/agpl-v3.md

[aligoren]

After work, I'll check what @tdemin said. Also, @qwe19272375 gave a good idea to me :)