FindHIP: Handle remove_item from empty lists

Change-Id: I6adf31b32edeae9e8454b1a2528064cf3985fca1

hipamd/cmake/FindHIP.cmake

@@ -514,7 +514,7 @@ macro(HIP_ADD_EXECUTABLE hip_target)
     # Separate the sources from the options
     HIP_GET_SOURCES_AND_OPTIONS(_sources _cmake_options _hipcc_options _hcc_options _nvcc_options ${ARGN})
     HIP_PREPARE_TARGET_COMMANDS(${hip_target} OBJ _generated_files _source_files ${_sources} HIPCC_OPTIONS ${_hipcc_options} HCC_OPTIONS ${_hcc_options} NVCC_OPTIONS ${_nvcc_options})
-    list(REMOVE_ITEM _sources ${_source_files})
+    list(REMOVE_ITEM _sources "${_source_files}")
     if("x${HCC_HOME}" STREQUAL "x")
         set(HCC_HOME "/opt/rocm/hcc")
     endif()
@@ -530,7 +530,7 @@ macro(HIP_ADD_LIBRARY hip_target)
     # Separate the sources from the options
     HIP_GET_SOURCES_AND_OPTIONS(_sources _cmake_options _hipcc_options _hcc_options _nvcc_options ${ARGN})
     HIP_PREPARE_TARGET_COMMANDS(${hip_target} OBJ _generated_files _source_files ${_sources} ${_cmake_options} HIPCC_OPTIONS ${_hipcc_options} HCC_OPTIONS ${_hcc_options} NVCC_OPTIONS ${_nvcc_options})
-    list(REMOVE_ITEM _sources ${_source_files})
+    list(REMOVE_ITEM _sources "${_source_files}")
     add_library(${hip_target} ${_cmake_options} ${_generated_files} ${_sources})
     set_target_properties(${hip_target} PROPERTIES LINKER_LANGUAGE ${HIP_C_OR_CXX})
 endmacro()