Bug#1051076: dash: test does not support s1 < s2 or s1 > s2

[Gian Piero Carrubba]

severity 1051076 grave
thanks

Thinking about it, grave seems a more appropriate severity as the issue 
could cause data loss in case s2 happens to be the pathname of an 
existent file when using the form `test s1 > s2`.