Reproducible tar balls (quick and dirty)

commit 6a3a59bc34931b3f2ae97504f2e4e9ebaeb53fe4
Author: Fabian Keil <fk@fabiankeil.de>
Date:   Mon May 11 18:45:24 2015 +0200

    release: Use a hack to recreate dist tarballs with reproducible timestamps

diff --git a/release/Makefile b/release/Makefile
index 63a148a..456631d 100644
--- a/release/Makefile
+++ b/release/Makefile
@@ -265,6 +265,9 @@ mini-memstick.img: bootonly
        sh ${.CURDIR}/${TARGET}/make-memstick.sh bootonly ${.TARGET}
 
 packagesystem: base.txz kernel.txz ${EXTRA_PACKAGES}
+       for tarball in *.txz; do \
+           sh ${.CURDIR}/scripts/tar-time-reset.sh $${tarball}; \
+       done
        sh ${.CURDIR}/scripts/make-manifest.sh *.txz > MANIFEST
        touch ${.TARGET}