Revert "[cmake] Do not use as-needed for APPLE."

This reverts commit 20979705.

tests/CMakeLists.txt

@@ -35,10 +35,7 @@ SET_TARGET_PROPERTIES(${PYTHON_MODULE} PROPERTIES
   PREFIX ""
   OUTPUT_NAME ${LIBRARY_NAME}/wrap)
 
-IF (UNIX AND NOT APPLE)
-  TARGET_LINK_LIBRARIES(${PYTHON_MODULE} "-Wl,--no-as-needed")
-ENDIF()
-
+TARGET_LINK_LIBRARIES(${PYTHON_MODULE} "-Wl,--no-as-needed")
 TARGET_LINK_LIBRARIES(${PYTHON_MODULE} ${LIBRARY_NAME} ${PYTHON_LIBRARY})
 TARGET_INCLUDE_DIRECTORIES(${PYTHON_MODULE} SYSTEM PUBLIC ${PYTHON_INCLUDE_DIRS})