File _multibuild of Package darktable

<multibuild>
  <package>skylake</package>
  <package>skylake-avx512</package>
  <package>goldmont</package>
  <package>raptorlake</package>
  <package>znver4</package>
  <package>znver5</package>
  <package>asan</package>
</multibuild>