[OpenCL] update address-spaces.cl (#162785)
This test was broken by
https://github.com/llvm/llvm-project/pull/162714. Previously the
`[[clang::opencl_private]]` attribute was applied first, resulting in
the clashing `__global` attribute being ignored. Now that `__global` is
applied first, it results in an error, and then
`[[clang::opencl_private]]` is applied, resulting in another error.
