init.sh: only update version files on parent

don't update them on child instances, since it's a waste
of time; the lock file prevents further execution, so we
are just wasting time writing to disk.

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

include/lib.sh

@@ -15,13 +15,17 @@ remkdir()
 
 mkrom_tarball()
 {
-	printf "%s\n" "$version" > "$1/.version" || err "$1 !version"
-	printf "%s\n" "$versiondate" > "$1/.versiondate" || err "$1 !vdate"
-
+	update_xbmkver "$1"
 	mktarball "$1" "${1%/*}/${relname}_${1##*/}.tar.xz"
 	x_ rm -Rf "$1"
 }
 
+update_xbmkver()
+{
+	printf "%s\n" "$version" > "$1/.version" || err "$1 !version"; :
+	printf "%s\n" "$versiondate" > "$1/.versiondate" || err "$1 !vdate"; :
+}
+
 mktarball()
 {
 	printf "Creating tar archive '%s' from directory '%s'\n" "$2" "$1"