Mark all patches as applied upstream for 2018.3

This includes one that was previously considered to be Debian-specific
(moving to Python 3 for tests).

debian/patches/Use-Python-3-for-tests.patch

@@ -3,7 +3,11 @@ Date: Wed, 17 Jan 2018 14:07:32 +0000
 Subject: Use Python 3 for tests
 
 Signed-off-by: Simon McVittie <smcv@debian.org>
+Closes: #1463
+Approved by: cgwalters
 Forwarded: https://github.com/ostreedev/ostree/pull/1463
+[smcv: Remove ci/* changes: those files are not in tarball releases]
+Applied-upstream: 2018.3, commit:971265e4e48f2ff512633b27c90569315ff168ff
 ---
  tests/bootloader-entries-crosscheck.py | 2 +-
  tests/test-basic-user-only.sh          | 2 +-