[PATCH v2 10/12] soft-fp: Add the lack of implementation for 128 bit

[DJ Delorie]

Ok, I won't argue that every patch needs a test case if it should
already be covered elsewhere (which is all I expected).  But if so, then
*some* existing failure should be attributable to this bug, and fixing
the bug should show improvements in the testsuite results too.

Either way, we should have some way of knowing that a bug is really a
bug, and that the fix really fixed it, no matter how indirect.