[patch/obv] Skip gdb.trace/status-stop.exp if target doesn't support trace

[Yao Qi <yao at codesourcery dot com>]

I noticed that gdb.trace/status-stop.exp is run on target that doesn't
support tract at all.  Like other test cases in gdb.trace,
gdb_target_supports_trace should be called first to check target
supports trace or not, which is missing in gdb.trace/status-stop.exp.
This patch is to check gdb_target_supports_trace first, like other
gdb.trace tests.

It is obvious.  Committed.

-- 
Yao (éå)

gdb/testsuite/

	* gdb.trace/status-stop.exp: Skip it if target doesn't support trace.

diff --git a/gdb/testsuite/gdb.trace/status-stop.exp b/gdb/testsuite/gdb.trace/status-stop.exp
index 6c92b75..e01ff32 100644
--- a/gdb/testsuite/gdb.trace/status-stop.exp
+++ b/gdb/testsuite/gdb.trace/status-stop.exp
@@ -27,6 +27,16 @@ if [prepare_for_testing $expfile $executable $srcfile \
     return -1
 }
 
+if ![runto_main] {
+    fail "Can't run to main to check for trace support"
+    return -1
+}
+
+if ![gdb_target_supports_trace] {
+    unsupported "target does not support trace"
+    return -1; 
+}
+
 # Verify that the sequence of commands "tstart tstop tstart" works well.
 
 proc test_tstart_tstop_tstart { } {