build: Using --header and --body at the same time is deprecated

[rbuj]

dbus-binding-tool also displays this warning, that should disappear after porting to gdbus-codegen.

[sc0w]

ok, so, the commit message can be changed to be more explicity?

[rbuj]

I don't think it's necessary to change the commit title. I recall that a similar title has been used before in other commits. Let other members speak as we do not agree.

[sc0w]

@rbuj

warnings with the same message...

WARNING: Using --header and --body at the same time is deprecated; use --body --prototypes instead

...are still there, I don't understand why you don't like to add one simple word: "media-keys"

[raveit65]

Can you please agree?