[libc-commits] [libc] [libc] Fix tests' linking flags accidentally modified by #147931. (PR #149453)

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lntue wrote:

> Changing the order of linking for `gcc`. otherwise LGTM.

Moved libgcc_s to after __libc__ on both hermetic test and integration test.

https://github.com/llvm/llvm-project/pull/149453