qa: add setsid test to newlib

qa/lib/newlib/050-setsid.runner

@@ -0,0 +1,15 @@
+#!/cmd/rc
+runner=$0
+test = `{echo $runner|sed 's/.runner//'}
+test_output = /tmp/output-`{basename $test}
+
+if ( test -e $test_output) rm $test_output
+
+$test $test_output > /dev/null
+if ( cat $test_output | grep 'FAIL' > /dev/null ) {
+	cat $test_output
+	echo FAIL
+	exit FAIL
+}
+echo PASS
+exit PASS