xplanet: optionally use cspice.

Along with general housekeeping. The formulas now offers all XPlanet
configure options. Also modified the formula to the new Homebrew syntax
standards.
xplanet: add 1.3.0 bottle.

Closes #28015.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
Capstone 2.1.2

Update Capstone to version 2.1.2
Update capstone.rb
capstone: add 2.1.2 bottle.