Fix for target_link_libraries on CMake 2.8 (pytorch#581)

Author: lukeyeager

torch/lib/THPP/CMakeLists.txt

@@ -54,7 +54,7 @@ if(NOT ${CMAKE_VERSION} VERSION_LESS "3.1")
     SET_PROPERTY(TARGET THPP PROPERTY CXX_STANDARD 11)
 endif(NOT ${CMAKE_VERSION} VERSION_LESS "3.1")
 
-TARGET_LINK_LIBRARIES(THPP PRIVATE ${TH_LIBRARIES})
+TARGET_LINK_LIBRARIES(THPP LINK_PRIVATE ${TH_LIBRARIES})
 
 INSTALL(TARGETS THPP
   RUNTIME DESTINATION "${THPP_INSTALL_BIN_DIR}"