Add command-line option to show build options used to build jq

[nicowilliams]

It would be nice to have a command-line option by which to show the ./configure build options used to build jq. Or perhaps a digested version of that, like if Oniguruma was used from the sub-module, whether stack protection features were enabled (and which), etc.

[nicowilliams]

See #1514.

[itchyny]

I feel --config is unsuitable option, maybe --version-debug, --version-verbose or something else. I know vim exposes compilation/linking options in --version, but I don't like to expose the information of build environment honestly.

[nicowilliams]

How about --build-configuration?

[itchyny]

Sounds good.