[clang] Enable offloadlib option in SYCL and CL mode (PR #162980)

[Alexey Bader via cfe-commits]

bader wrote:

> I don't have more changes in this PR. The sycl toolchain can be invoked via CL compatibility mode in driver, so I enable this option in CL compatibility mode.

If I get it right, `--[no-]offloadlib` option can be used in SYCL even w/o this patch, so the title is misleading. The change has no functional changes for SYCL. Please, remove SYCL and add tags to the PR title. E.g. `[Clang][Driver] Enable offloadlib option for clang-cl`.

> --[no-]offloadlib option is used by rocm and cuda toolchain to enable/disable device libraries in linking phase for device code. It makes sense to re-use this option in sycl for similar purpose and since clang driver support sycl in CL compatibility mode as well, we also need to enable this option in CL compatibility mode.

Please, capitalize SYCL in the description: sycl -> SYCL.


https://github.com/llvm/llvm-project/pull/162980