RAND_set_rand_method takes a const parameter.

Change-Id: I37e7c00deeb74aa0b71ee0d3a242d33d4d413cf0
diff --git a/crypto/rand/rand.c b/crypto/rand/rand.c
index de65b4e..daebdf0 100644
--- a/crypto/rand/rand.c
+++ b/crypto/rand/rand.c
@@ -181,4 +181,4 @@
   return (RAND_METHOD*) &kSSLeayMethod;
 }
 
-void RAND_set_rand_method(RAND_METHOD *method) {}
+void RAND_set_rand_method(const RAND_METHOD *method) {}