Drop imaging support from reportlab

[D'Arcy Cain <darcy%NetBSD.org@localhost>]

I would like to make the following change to print/py-reportlab:

Index: Makefile
===================================================================
RCS file: /cvsroot/pkgsrc/print/py-reportlab/Makefile,v
retrieving revision 1.55
diff -r1.55 Makefile
16c16
< DEPENDS+= 
{${PYPKGPREFIX}-Pillow-[0-9]*,${PYPKGPREFIX}-imaging-[0-9]*}:../../graphics/py-Pillow
---
> DEPENDS+=     ${PYPKGPREFIX}-Pillow-[0-9]*:../../graphics/py-Pillow

The reason is that the original fails if it is a dependency of a Python 
2.7 package.  It builds the ${PYTHON_VERSION_DEFAULT} version anyway. 
Since imaging is no longer maintained and Pillow is a plug and play 
replacement this seems like the simplest solution.

There are two other ways to fix this as I see it.  We could fix the 
dependency logic but that is a bit beyond my current skills and 
available time.  The other way is to create a PREFER_IMAGING variable 
that can be tested by packages such as these.

What say you all?

--
D'Arcy J.M. Cain <darcy%NetBSD.org@localhost>
http://www.NetBSD.org/ IM:darcy%Vex.Net@localhost