c/3711: rename 20020307-2.c after change

[Richard Sandiford]

Geoffrey Keating <geoffk@redhat.com> writes:
> Way back in March, rth changed 20020307-2.c in mainline, which made it
> fail, but didn't change its name... This patch corrects the oversight.

Could you clarify why this is necessary?  Is it policy not to
"correct" an existing test cases?

I'd like to rework some comparisons in execute/conversion.c so that they
support all rounding modes (details still to be worked out).  Should I
rename it to something like execute/conversion2.c at the same time?

Richard