dealing with packages that put * in wheels

[Greg Troxel <gdt%lexort.com@localhost>]

matrix-synapse has some patches, to work around upstream bugs.  This is
of course normal.

The build installs foo.orig, resulting in a PLIST error that foo.orig is
in DESTDIR.  But the error is the installed file not the PLIST.
Removing them from the source  directory in pre-build: avoids this, but
removing in pre-install: does not.

Generally, one doesn't want to remove these early so that a

  make
  pkgvi
  make
  mkpatches

session will do the right thing.

I am pretty sure the issue is that these end up in .whl at build time,
and install just installs the wheel.

Is it unusually buggy of python programs to put *.orig in wheels?

Do we have a preferred way to deal with this?