shell-completion: add --xml-interface option of busctl to the rules

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
(cherry picked from commit a5efb0cc2b92d20f885b34c26254d9a9d45e3f4a)
(cherry picked from commit bda5c892a83a34a3e895c5e541f3eec19af8f04c)
(cherry picked from commit 88f058583b0d9a683012be4be7b32d5e4238fec4)

shell-completion/bash/busctl

@@ -85,7 +85,7 @@ _busctl() {
                       --show-machine --unique --acquired --activatable --list
                       -q --quiet --verbose --expect-reply=no --auto-start=no
                       --allow-interactive-authorization=no --augment-creds=no
-                      --watch-bind=yes -j -l --full'
+                      --watch-bind=yes -j -l --full --xml-interface'
         [ARG]='--address -H --host -M --machine --match --timeout --size --json
                       --destination'
     )

shell-completion/zsh/_busctl

@@ -276,6 +276,7 @@ _arguments \
     '--list[Do not show tree, but simple object path list]' \
     {-q,--quiet}'[Do not show method call reply]'\
     '--verbose[Show result values in long format]' \
+    '--xml-interface[Dump the XML description in introspect command]' \
     '--json=[Show result values in long format]:format:_busctl_get_json' \
     '-j[Show pretty json in interactive sessions, short json otherwise]' \
     '--expect-reply=[Expect a method call reply]:boolean:(1 0)' \