Add upstream patch to make it possible to build gcc on sparc64 [1]
Fix CONFIGURE_TARGET to do the right thing, previously the binutils build
could fail on amd64 when built as a dependency of for instance gcc. [2]
PR: ports/179291 [1]
Submitted by: Michael Moll <kvedulv@kvedulv.de> (PR) [1]
Reported by: kwm and dim [2]
