[gentoo-dev] Further changes to multibuild.eclass

[Michał Górny]

Four more patches so far:

1) print only 'public' part of command-line

That is, shift over all the arguments starting with an underscore
for einfo.

  multibuild_foreach_variant _python_multibuild_wrapper foo

will be printed as:

  pythonX.Y: foo


2) add a function to run the command for the 'best' (default, preferred)
variant.


3) use it to implement multilib_for_best_abi().

A few ebuilds will happily use it instead of the current hacks.


4) use it to run *_all() phases in distutils-r1.

This fixes bug 460016 (python_configure_all() doesn't have best-impl if
there's no python_configure()).