rsh.exp: Handle regexp return status

[Christophe Lyon]

Hello,

I noticed that in rsh.exp, we do not handle regexp return status.
In some cases where the test output is truncated, XYZ$?ZYX
cannot match, but this is un-noticed.

The attached patch fixes this. Note that I also needed to patch
GCC's testsuite/lib/gcc-dg.exp because we now return unresolved
for testcases where the output is truncated while GCC
only expects "pass" or "fail". The GCC patch looks like:

diff --git a/gcc/testsuite/lib/gcc-dg.exp b/gcc/testsuite/lib/gcc-dg.exp
index 9e4ecce..6cdce0d 100644
--- a/gcc/testsuite/lib/gcc-dg.exp
+++ b/gcc/testsuite/lib/gcc-dg.exp
@@ -380,6 +380,7 @@ if { [info procs ${tool}_load] != [list] \
            switch [lindex $result 0] {
                "pass" { set status "fail" }
                "fail" { set status "pass" }
+               default { set status [lindex $result 0] }
            }
            set result [list $status [lindex $result 1]]
        }

I will submit it separately of course.

OK?

Christophe

dj-rsh.log.txt
Description: Text document

dj-rsh.patch.txt
Description: Text document