This port is special, it is done only for being cross build and prepare a modern
compiler for base system build without a cross compiler
It contains the printf format extension needed for the kernel as only patch for
now.
It uses libc++ from base as a standard c++ library default on the libc++ headers
as c++ headers
Add a cross buildable binutils package.
The new category is not linked to the regular ports tree to avoid make install,
poudriere and others to catch it automagically
instead of ending with a very complex file removal in the stage, prefer to use
specific plist per arch.
For now only sparc64 tested and added. This version of binutils is stipped down
only the components that are not supported by elftoolchain
