[testsuite] gcc-dg: handle all return values when shouldfail is set

[Christophe Lyon]

Hi,

While investigating stability problems when running GCC validations,
I fixed DejaGnu to properly handle cases where it cannot parse the
testcase output:
http://lists.gnu.org/archive/html/dejagnu/2016-04/msg00008.html

This means that such cases now return "unresolved" which confuses
${tool}_load in gcc-dg.exp, as it currently only handles "pass" and "fail".

The attached small patch fixes this.

This is probably for stage 1 only I guess.

OK?

Christophe.

2016-04-13  Christophe Lyon  <christophe.l...@linaro.org>

        * lib/gcc-dg.exp (${tool}_load): Add default return value handler.

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]]
        }