Fix build with exiv2-0.27.1
Summary:
Upstream is moving things around between headers. While they are busy doing that, they recommend including exiv2.hpp.
lib/imagemetainfomodel.cpp:293:40: error: expected unqualified-id before ‘&’ token } catch (const Exiv2::Error& error) { ^
Reviewers: Gwenview, ngraham
Reviewed By: Gwenview, ngraham
Subscribers: ngraham, devurandom
Tags: Gwenview
Differential Revision: https://phabricator.kde.org/D21148