meson: omit bash completion, with custom prefix
In order for bash completions to work, they must be installed in the
respective folder. Often that folder is writable only by root.
In order words, using a command line the following now is successful,
providing indicative warning message.
meson builddir --prefix `pwd`/inst
...
meson.build:140: WARNING: User provided prefix '.../inst' differs from bash-completion one '/usr'. Disabling completion.
Reported-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
(cherry picked from commit
8867ab9a223aaa22d844d6d7977e57b491a68c86)