Add 'subs1/' from commit 'aa496dfe5362e73c10272c6a547c9b459bbb3420'

git-subtree-dir: subs1
git-subtree-mainline: 4976f9edb9438d3fd6840901d47045fe5bc38700
git-subtree-split: aa496dfe5362e73c10272c6a547c9b459bbb3420
add file