kdepim ABI

[Harald Sitter]

http://anonscm.debian.org/cgit/pkg-kde/applications/kdepim.git/commit/?h=kubuntu_wily_archive&id=c76f2759cc10a2b19138f083da5791858cbd3e1c

it appears to me the only incompatible change is [1] which appears to
be in viewer.h which hasn't been installed in the present soversion
ever, so this is actual private ABI that was changed and doesn't
warrant soversion twiddling of any magnitude.

[1] https://quickgit.kde.org/?p=kdepim.git&a=commit&h=9d52b22b3652f4dc274114f41c6ea83a31477c01