S/390: Increase tst-tls7 test case timeout

TLS in a dlopened object works fine when accessed from a signal
handler. The default kernel scheduling parameters prevents the
testcase to finish within the 4 seconds.

Tested the bigger timeout on s390 and s390x.

nptl/ChangeLog

@@ -1,3 +1,7 @@
+2014-01-23  Stefan Liebler  <stli@linux.vnet.ibm.com>
+
+	* tst-tls7.c: Adjust testcase timeout
+
 2014-01-18  H.J. Lu  <hongjiu.lu@intel.com>
 
 	[BZ #14782]

nptl/tst-tls7.c

@@ -137,7 +137,7 @@ do_test (void)
   return 0;
 }
 
-#define TIMEOUT 4
+#define TIMEOUT 8
 
 #define TEST_FUNCTION do_test ()
 #include "../test-skeleton.c"