fix for failing tests with gmime 2.6.19

[Daniel Kahn Gillmor]

On 11/10/2013 11:21 AM, David Bremner wrote:
> Although Jeffrey Stedfast fixed gmime bug 711305 amazingly quickly, it
> looks like many people still have to live with a buggy version of
> gmime for a while yet. Here is an opt-in fix that stops the test suite
> from failing; this is a simple fix for e.g. the debian build process.

I think you're referring to:

https://bugzilla.gnome.org/show_bug.cgi?id=711305

Please don't introduce this cruft into the notmuch codebase.  It should
be fixed in gmime, not worked-around notmuch.

I've just uploaded gmime 2.6.19-2 to unstable to address this issue.

	--dkg