fix: don't require git config for dependencies

this was an oversight on my part. the script cannot be
run as root, except to install distro dependencies e.g.:

as root: ./build dependencies debian

however, ./checkgit was being run *before* checking that,
making it required to set git config as root.

this patch fixes that bug.

Signed-off-by: Leah Rowe <leah@libreboot.org>

lbmk

@@ -44,8 +44,6 @@ main()
 		err "running lbmk as root is not permitted"
 	fi
 
-	./checkgit || err "Please read: https://libreboot.org/docs/build/"
-
 	buildpath="./script/${0##*/}"
 
 	[ "${mode}" = "help" ] && usage ${0} && exit 0
@@ -58,6 +56,8 @@ main()
 		exit 0
 	fi
 
+	./checkgit || err "Please read: https://libreboot.org/docs/build/"
+
 	option="${2}"
 	shift 2