COMP: Cleanup CMP0022 warnings in GDCM module

CMake 2.8.12 introduces policy CMP0022 that trigger warnings in some of ITK's
GDCM CMake code.  Fix them as follows.  CMP0022 warns when we set the
LINK_INTERFACE_LIBRARIES property directly without also setting the newly
introduced INTERFACE_LINK_LIBRARIES property directly.  Set the new property
to the same value as the old property so that we get the same behavior
regardless of the CMP0022 setting.

Change-Id: I5dcf742ae662763905af8cbb0e64785b95034fc9
Merge topic 'cleanup-CMP0022-warnings'

e92ad0c COMP: Cleanup CMP0022 warnings in GDCM module