Move all patch generation scripts to debian/bin

Rename them to genpatch-{aufs,lockdown,rt}

Fixes lintian warning patch-file-present-but-not-mentioned-in-series.

Also preparation for using dgit, which will remove everything except
the main patch series under debian/patches.

debian/bin/genpatch-aufs

@@ -24,7 +24,7 @@ for patch in aufs4-{base,mmap,standalone}.patch; do
 	echo "$origin_line"
 	echo "$bug_line"
 	echo
-	echo 'Patch headers added by debian/patches/features/all/aufs4/gen-patch'
+	echo 'Patch headers added by debian/bin/genpatch-aufs'
 	echo
 	sed 's/^+.*EXPORT_SYMBOL\b/&_GPL/' < "$aufs_dir"/"$patch"
     } > debian/patches/features/all/aufs4/"$patch"

debian/changelog

@@ -2,6 +2,7 @@ linux (4.18.6-2) UNRELEASED; urgency=medium
 
   [ Ben Hutchings ]
   * [x86] wireless: Enable R8822BE as module (Closes: #908330)
+  * Move all patch generation scripts to debian/bin
 
   [ Salvatore Bonaccorso ]
   * mac80211: don't update the PM state of a peer upon a multicast frame

debian/patches/series

@@ -29,9 +29,8 @@ bugfix/all/firmware-remove-redundant-log-messages-from-drivers.patch
 bugfix/all/radeon-amdgpu-firmware-is-required-for-drm-and-kms-on-r600-onward.patch
 debian/firmware_class-refer-to-debian-wiki-firmware-page.patch
 
-# Patches from aufs4 repository, imported with
-# debian/patches/features/all/aufs4/gen-patch.  These are only the
-# changes needed to allow aufs to be built out-of-tree.
+# Patches from aufs4 repository, imported with debian/bin/genpatch-aufs.
+# These are only the changes needed to allow aufs to be built out-of-tree.
 features/all/aufs4/aufs4-base.patch
 features/all/aufs4/aufs4-mmap.patch
 features/all/aufs4/aufs4-standalone.patch