CMakeLists: Restrict response file check to complex+double+Cuda

Addresses issue #148. The check for
CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS enabled is only necessary when
complex+double+Cuda with ETI occurs.

CMakeLists.txt

@@ -75,8 +75,8 @@ TRIBITS_ADD_OPTION_AND_DEFINE(
     LIST(APPEND DEVICE_LIST "<Cuda,CudaUVMSpace>")
   ENDIF()
 
-  IF((NOT DEFINED CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS) OR (NOT CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS))
-    MESSAGE( FATAL_ERROR "The CMake option CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS is either undefined or OFF.  Please set CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS:BOOL=ON when building with CUDA.")
+  IF( KokkosKernels_INST_DOUBLE AND Trilinos_ENABLE_COMPLEX_DOUBLE AND ((NOT DEFINED CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS) OR (NOT CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS)) )
+    MESSAGE( FATAL_ERROR "The CMake option CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS is either undefined or OFF.  Please set CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS:BOOL=ON when building with CUDA and complex double enabled.")
   ENDIF()
 
 ENDIF()