* tests/test-strtof.h: New file, extracted from tests/test-strtof.c.
* tests/test-strtof.c: Include test-strtof.h.
(FABS): Remove unused macro.
(main): Just invoke test_function.
* tests/test-strtof1.c: Add comment.
* modules/strtof-tests (Files): Add tests/test-strtof.h.
* tests/test-c-strtof.c: New file, based on tests/test-strtof.c.
* tests/test-c-strtof1.c: New file, based on tests/test-strtof1.c.
* tests/test-c-strtof1.sh: New file, based on tests/test-strtof1.sh.
* modules/c-strtof-tests: New file, based on modules/strtof-tests.