community/xbindkeys: use default features

Alpine's version of xbindkeys has been crippled since its initial inclusion. Presumably because a mismatch between the version of upstream's guile dependency (1.8-2.2) and the alpine packaged version (3.0, only)? Upstream did however add support for version 3.0 of guile over four years ago. They just have not made any release since then.

With this effectively being a four character trivial change, one might consider it reasonable to be pragmatic in aports until upstream seems any real development.

It is highly unexpected that this feature is disabled and deviating from upstream, given this quote (which is even there to read in the reduced functionality version distributed by alpine) from the man page:

Note: The guile configuration file is prefered for non trivial configurations

The current situation where xbindkeys is essentially useless for most users migrating to alpine with an existing config is not ideal.

Thus,

Patch dependency version to allow building with upstream's default feature set.