FindCUDAToolkit: Add nvptxcompiler_static dependency on Threads::Threads

Modules/FindCUDAToolkit.cmake

@@ -366,7 +366,7 @@ This is a static library only.
 
 Targets Created:
 
-- ``CUDA::nvptxcompiler`` starting in CUDA 11.1
+- ``CUDA::nvptxcompiler_static`` starting in CUDA 11.1
 
 .. _`cuda_toolkit_nvRTC`:
 
@@ -1059,6 +1059,7 @@ if(CUDAToolkit_FOUND)
   _CUDAToolkit_find_and_add_import_lib(nvrtc DEPS cuda_driver)
   if(CUDAToolkit_VERSION VERSION_GREATER_EQUAL 11.1.0)
     _CUDAToolkit_find_and_add_import_lib(nvptxcompiler_static DEPS cuda_driver)
+    target_link_libraries(CUDA::nvptxcompiler_static INTERFACE Threads::Threads)
   endif()
 
   _CUDAToolkit_find_and_add_import_lib(nvml ALT nvidia-ml nvml)