[perl #47393] t/configure/107-inter_progs-*.t all fail

[James Keenan via RT]

With the application of patches in r24102 (Dec 19) and r24294 (Dec 30),
the issues raised by Andy Dougherty have been addressed.  He reports all
tests are passing.  As I have done with other configuration step
classes, I have refactored as much code as possible out of runstep() and
placed it in other subroutines which I test explicitly.  We no longer
directly test the cc_build and cc_run called within test_compiler(), but
we test all around them, which is good enough.  Closing ticket.