In B.xs refactor cc_opclassname() to make_op_object().

In B.xs refactor cc_opclassname() to make_op_object().

All bar one of the callers to cc_opclassname() were using it in the same way -
to pass as the second argument of newSVrv(), whose first argument was a new
mortal, and return value was used with sv_setiv() and PTR2IV(). So clearly
*that* is the common code needed.

Inline the existing code (all 1 line of it) in the other location that called
cc_opclassname(). As the typemap was using cc_opclassname(), replace the 4
implicit uses of it with explicit PPCODE sections. Curiously, removing the use
of this typemap actually reduces the line count of B.xs

On this platform, this reduces the object code size by almost .5K.