Fix installation instructions for Gentoo Linux
Fix installation instructions for Gentoo Linux

Signed-off-by: Marat Radchenko <2089d3fab0c51db3809c7a5f7dbc68b8f0e36ef4@slonopotamus.org>

Signed-off-by: Marat Radchenko <2089d3fab0c51db3809c7a5f7dbc68b8f0e36ef4@slonopotamus.org>
nalind/buildah-1,nalind/buildah-1,nalind/buildah-1