smtk: install plugins in a known directory

Projects/smtk.cmake

@@ -12,6 +12,11 @@ if (WIN32)
   list(APPEND extra_cmake_args "-DSMTK_PYTHON_MODULEDIR:PATH=${SuperBuild_BINARY_DIR}/install/python")
 endif()
 
+set(smtk_libdir lib)
+if (WIN32)
+  set(smtk_libdir bin)
+endif ()
+
 add_external_project_or_just_build_dependencies(smtk
   DEPENDS boost qt shiboken paraview remus
   CMAKE_ARGS
@@ -27,6 +32,7 @@ add_external_project_or_just_build_dependencies(smtk
     -DSMTK_ENABLE_REMOTE_SESSION:BOOL=ON
     -DSMTK_ENABLE_REMUS_SUPPORT:BOOL=ON
     -DSMTK_ENABLE_PYTHON_WRAPPING:BOOL=${shiboken_ENABLED}
+    -DCMAKE_INSTALL_LIBDIR:STRING=${smtk_libdir}
 
     -DParaView_DIR:PATH=${paraview_dir}
     -DBOOST_INCLUDEDIR:PATH=<INSTALL_DIR>/include/boost