feat(os): For default AUR builds increase makepkg core use (#1)

setup.sh

@@ -370,6 +370,12 @@ function create_unpriv_user () {
     chown -R "${account_name}"':' '/home/'"${account_name}"; chmod -R 'u=rwX,go=' "$(dirname "${authorized_keys_abs_path}")"
 }
 
+function unleash_makepkg () {
+    sed -ri \
+        -e 's'$'\x1''^(#?(MAKEFLAGS=))[^\r\n\f]*'$'\x1''\2"-j$(nproc --ignore 1)"'$'\x1''g' \
+        '/mnt/etc/makepkg.conf'
+}
+
 function get_aur_helper () {
     create_unpriv_user 'build'
     usermod --append --groups 'wheel' 'build'