gfxinfo: fix loading the databases before release
In b6c0449e, I was counting on Tox to run the tests and thus trigger the caching of the databases. While it indeed happens, it wasn't happening in the source folder but rather in the .tox/ folder :s
Let's fix this by calling gfxinfo --check-db
ourselves before the
release, and ensuring this is done in the source directory by
installing gfxinfo using pip's --editable
option.
Fixes: b6c0449e ("gfxinfo/amdgpu: automatically cache the database")