Update FindHIP.cmake

Adding another flag.

[ROCm/hip commit: 584e61b9f3]

projects/hip/cmake/FindHIP.cmake

@@ -28,6 +28,7 @@ mark_as_advanced(HIP_HOST_COMPILATION_CPP)
 ###############################################################################
 # Copy the invocation styles from CXX to HIP
 set(CMAKE_HIP_ARCHIVE_CREATE ${CMAKE_CXX_ARCHIVE_CREATE})
+set(CMAKE_HIP_ARCHIVE_APPEND ${CMAKE_CXX_ARCHIVE_APPEND})
 set(CMAKE_HIP_ARCHIVE_FINISH ${CMAKE_CXX_ARCHIVE_FINISH})
 set(CMAKE_SHARED_LIBRARY_SONAME_HIP_FLAG ${CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG})
 set(CMAKE_SHARED_LIBRARY_CREATE_HIP_FLAGS ${CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS})