HBSD: Enable production mode in the update archive build tool

Signed-off-by: Shawn Webb <shawn.webb@hardenedbsd.org>
github-issue:	#171
Sponsored-by:	G2, Inc

usr.sbin/hbsd-update/hbsd-update-build

@@ -53,8 +53,8 @@ setup_environment() {
 	OUTPUTDIR="/builds/updater/output"
 	CHROOTDIR="/builds/updater/chroot"
 	LOGDIR="/builds/updater/logs"
-	FULLCLEAN="no"
-	DEVMODE="yes" # set to empty instead of "no"
+	FULLCLEAN="yes"
+	DEVMODE="" # set to empty instead of "no"
 	SRCCONFPATH=""
 	DEBUGBUILD=""
 	USE_EXISTING=0