Use std::rand() not random()

Seed random with the current time


[SVN r14036]

libs/signals

@@ -1 +1 @@
-Subproject commit e937ed51ccf77b0eccf674b7f289a20cc8fff30a
+Subproject commit ce4b8801cc47b83e4fa3a2aa512443f2d8192e5f