fenv-* tests: Add tests of the link dependencies

[Bruno Haible]

The tests should also verify that the $(FENV_..._LIBM) variables contain
the necessary -l options for a successful link. This patch does it.


2023-11-07  Bruno Haible  <bruno@clisp.org>

        fenv-environment tests: Add a test of the link dependencies.
        * tests/test-fenv-env-6.c: Renamed from tests/test-fenv-env-5.c.
        * tests/test-fenv-env-5.c: Renamed from tests/test-fenv-env-4.c.
        * tests/test-fenv-env-4.c: Renamed from tests/test-fenv-env-3.c.
        * tests/test-fenv-env-3.c: Renamed from tests/test-fenv-env-2.c.
        * tests/test-fenv-env-2.c: Renamed from tests/test-fenv-env-1.c.
        * tests/test-fenv-env-1.c: New file.
        * tests/test-fenv-env-6.sh: Renamed from tests/test-fenv-env-5.sh. 
Update.
        * modules/fenv-environment-tests: Update. Add test-fenv-env-1 unit test.

2023-11-07  Bruno Haible  <bruno@clisp.org>

        fenv-exceptions-state-c99 tests: Add a test of the link dependencies.
        * tests/test-fenv-except-state-4.c: Renamed from
        tests/test-fenv-except-state-3.c.
        * tests/test-fenv-except-state-3.c: Renamed from
        tests/test-fenv-except-state-2.c.
        * tests/test-fenv-except-state-2.c: Renamed from
        tests/test-fenv-except-state-1.c.
        * tests/test-fenv-except-state-1.c: New file.
        * modules/fenv-exceptions-state-c23-tests: Update.
        * modules/fenv-exceptions-state-c99-tests: Update. Add
        test-fenv-except-state-1 unit test.

0001-fenv-exceptions-state-c99-tests-Add-a-test-of-the-li.patch
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0002-fenv-environment-tests-Add-a-test-of-the-link-depend.patch
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