if apr_generate_random_bytes fails drop into the "lame"  generator instead
of continuing with a null seed.
This is needed for z/OS at a minimum as APR_HAS_RANDOM may be on, but if
crypto hardware is not enabled the call will fail.
(there are other ways apr_generate_random_bytes can fail though)

Index: apr-util/test/testdate.c
===================================================================
--- apr-util/test/testdate.c    (revision 603262)
+++ apr-util/test/testdate.c    (working copy)
@@ -146,6 +146,7 @@
     apr_time_t offset = 0;
     apr_time_t secstodate, newsecs;
     char datestr[50];
+    apr_status_t rv;

     for (year = 1970; year < 2038; ++year) {
         secstodate = year2secs[year - 1970] + offset;
@@ -156,7 +157,10 @@
     }

 #if APR_HAS_RANDOM
-    apr_generate_random_bytes((unsigned char *)&guess, sizeof(guess));
+    rv = apr_generate_random_bytes((unsigned char *)&guess, sizeof(guess));
+    if (rv != APR_SUCCESS) {
+      guess = apr_time_now() % APR_TIME_C(4294967291);
+    }
 #else
     guess = apr_time_now() % APR_TIME_C(4294967291);
 #endif