Update '.drone.yml'

.drone.yml

@@ -18,9 +18,7 @@ steps:
   image: archlinux:base-devel
   commands:
   - pacman -Syu --noconfirm
-  - useradd --no-create-home --shell=/bin/sh build && usermod -L build
-  - echo "build ALL=(ALL) NOPASSWD : ALL" >> /etc/sudoers
-  - echo "root ALL=(ALL) NOPASSWD : ALL" >> /etc/sudoers
-  - chown -R build:build /drone/src
+  - chmod +x setupbuild.sh
+  - sh setupbuild.sh
   - su build
   - MAKEFLAGS="-j$(nproc)" makepkg --syncdeps