Windows buildbot: use --timeout feature in Tools/buildbot/test-amd64.bat

Use the same default timeout than test.bat: 1 hour (3600 seconds).
diff --git a/Tools/buildbot/test-amd64.bat b/Tools/buildbot/test-amd64.bat
index 1bf124c..de64f25 100644
--- a/Tools/buildbot/test-amd64.bat
+++ b/Tools/buildbot/test-amd64.bat
@@ -1,3 +1,3 @@
 @rem Used by the buildbot "test" step.
 cd PCbuild
-call rt.bat -d -q -x64 -uall -rwW -n %1 %2 %3 %4 %5 %6 %7 %8 %9
+call rt.bat -d -q -x64 -uall -rwW -n --timeout=3600 %1 %2 %3 %4 %5 %6 %7 %8 %9