* tests/test-strtold.h: New file, extracted from tests/test-strtold.c.
* tests/test-strtold.c: Include test-strtold.h.
(FABSL): Remove unused macro.
(main): Just invoke test_function.
* tests/test-strtold1.c: Add comment.
* modules/strtold-tests (Files): Add tests/test-strtold.h.
* tests/test-c-strtold.c: New file, based on tests/test-strtold.c.
* tests/test-c-strtold1.c: New file, based on tests/test-strtold1.c.
* tests/test-c-strtold1.sh: New file, based on tests/test-strtold1.sh.
* modules/c-strtold-tests: New file, based on modules/strtold-tests.