Fix typo in context_cupy

Author: szymonlopaciuk

xobjects/context_cupy.py

@@ -455,10 +455,9 @@ def build_kernels(
             with open(save_source_as, "w") as fid:
                 fid.write(specialized_source)
 
-        extra_compile_args = (*extra_compile_args, "-DXO_CONTEXT_CUDA")
         extra_include_paths = self.get_installed_c_source_paths()
         include_flags = [f"-I{path}" for path in extra_include_paths]
-        xtr_compile_args.extend(include_flags)
+        extra_compile_args = (*extra_compile_args, *include_flags, "-DXO_CONTEXT_CUDA")
 
         module = cupy.RawModule(
             code=specialized_source, options=extra_compile_args