upload_nightly.sh: Add simple upload script for the nightly build

Instead of placing it on the Jenkins node and not being under SCM
let's put it here and keep it in this branch.

upload_nightly.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+DIST="201705-nightly"
+
+rsync --delete -avz tmp/deploy/ipk/    generic@sysmocom-downloads:sysmobts/$DIST/ipk
+rsync --delete -avz tmp/deploy/images/ generic@sysmocom-downloads:sysmobts/$DIST/images
+rsync --delete -avz tmp/deploy/tools/  generic@sysmocom-downloads:sysmobts/$DIST/tools
+rsync --delete -avz tmp/deploy/sdk/    generic@sysmocom-downloads:sysmobts/$DIST/sdk
+rsync --delete -avz tmp/cache/    generic@sysmocom-downloads:sysmobts/$DIST/cache-state
+rsync --delete -avz cache/    generic@sysmocom-downloads:sysmobts/$DIST/cache
+rsync --delete -avz conf/    generic@sysmocom-downloads:sysmobts/$DIST/conf
+rsync -avz tmp/deploy/sources/  generic@sysmocom-downloads:sysmobts/$DIST/sources