build: meson: Use variables present in pkg-config files

Although some paths related to DBus and PolicyKit are present in
their pkg-config files, those paths might not be writable for the
user. To solve this issue, some build options are present that can
be used to choose a different location.

However, usually these paths are relative to some other variables
such as `prefix`, `datadir`, etc. Using the `define_variable`
option the relative path can be change to point to a directory
under prefix.

These paths are now using relative paths based on the installation
`prefix` and their related options have been removed as they are
unnecessary now. Only `dbus_conf_dir` option has been left because
it must be modified depending on the distribution[0].

[0] contrib/fedora/rpm/NetworkManager.spec

0 files changed, 0 insertions, 0 deletions