Conditional installing of proxymodeltestsuite

[Stephen Kelly]

Alexander Neundorf wrote:
> 
> From kde4_add_library() in kdelibs/cmake/modules/KDE4Macros.cmake (which
> is included by FindKDE4Internal.cmake):
> "
>    # By default don't add any linked libraries to the "exported"
>    # link interfaces, so that executables linking against this library
>    # will not automatically add implicit dependencies to their link list.
>    #
>    # This reduces inter-package dependencies and makes it easier to remove
>    # dependencies of shared libraries without breaking binary
>    # compatibility.
>    if(NOT "${_add_lib_param}" STREQUAL "STATIC")
>       set_target_properties(${_target_NAME} PROPERTIES
>                             LINK_INTERFACE_LIBRARIES "" )
>    endif(NOT "${_add_lib_param}" STREQUAL "STATIC")
> "
> ...

Great. Thanks for that. I've added it to the patch.

Hopefully this one is ready for committing.

All the best,

Steve.