bug#18679: gzip-1.6 tests/unpack-invalid may override user file in /tmp

[Kiyoshi KANAZAWA]

Hello,

In file "tests/unpack-invalid", line 29
"if gzip -d <in >/tmp/out 2>/tmp/err; then"

User may be using the same file: /tmp/out & /tmp/err.
They should be created in tests directory.


--- Kiyoshi <yoi_no_myou...@yahoo.co.jp>