Update how Ly is built. (#30)

Fix ly build.

Co-authored-by: Takumi Sueda <[email protected]>

os-brainux/setup_brainux.sh

@@ -70,9 +70,8 @@ systemctl enable fake-hwclock
 # Ly
 apt install -y libpam0g-dev libxcb-xkb-dev
 cd /
-git clone https://github.com/nullgemm/ly.git
+git clone --recurse --submodules https://github.com/nullgemm/ly.git
 cd ly
-make github
 make
 make install
 cd /