* tests/numfmt/numfmt.pl: Move recently added test that depends
on long double support to the appropriately guarded set.
Also reduce the value to be in the definitely safe long double range.
Reported by Bruno Haible.
* tests/factor/factor.pl: Verify that embedded NULs
on stdin terminate the _number_.
* tests/numfmt/numfmt.p: Verify that embedded NULs
on stdin terminate the _line_.
https://github.com/coreutils/coreutils/pull/196
* tests/numfmt/mb-non-utf8.sh: Test GB18030 delimiter search.
* tests/local.mk: Reference the new test, and move
the existing numfmt.pl test from tests/misc to tests/numfmt.