[Debian-med-packaging] Bug#733629: This should be solved upstream

[Gert Wollny]

Just letting double-conversion provide a *.cmake file is probably not
sufficient, since the current version of ITK exposes the interface of
double-conversion through itkNumberToString.h by including it without
the leading subdirectory "double-conversion". 

The issue has now been reported upstream with a possible patch to solve
these problems: 

https://issues.itk.org/jira/browse/ITK-3396

Since this patch changes the ABI, I propose to only apply it with the
next major ITK release (i.e. 4.9).

The patch is also already available in the packaging svn: 

https://anonscm.debian.org/viewvc/debian-med/trunk/packages/insighttool
kit/trunk/debian/patches/itk-4.8.2-find
-doubleconversion.patch?revision=20625&view=markup

Best, 
Gert