[Bug testsuite/46913] send_log "$first != $second\n" in gdb-test fails when $first starts with '-'

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46913

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-12-12 
20:18:59 UTC ---
If it doesn't work on some expect or tcl or dejagnu versions, the alternative
would be
send_log "actual $first != expected $second\n"