DRD: added a test program that forks a process containing a detached thread.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11526 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/drd/tests/threaded-fork.vgtest b/drd/tests/threaded-fork.vgtest
new file mode 100644
index 0000000..9449729
--- /dev/null
+++ b/drd/tests/threaded-fork.vgtest
@@ -0,0 +1,2 @@
+prereq: ./supported_libpthread
+prog: threaded-fork