[babl] tools: Use rand when random is unavailable

[Øyvind Kolås <ok src gnome org>]

commit 00f4a0b36ee203038e649ab7b3fdb3fe1468b9ce
Author: Edward E <develinthedetail gmail com>
Date:   Tue Aug 22 16:31:56 2017 -0500

    tools: Use rand when random is unavailable
    
    borrowed from c1f075f22c70de54c2b04ca5df008a5e406d3ca9

 tools/babl-benchmark.c       |    5 +++++
 tools/babl-gen-test-pixels.c |    5 +++++
 2 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/tools/babl-benchmark.c b/tools/babl-benchmark.c
index 3ed3539..fa964f9 100644
--- a/tools/babl-benchmark.c
+++ b/tools/babl-benchmark.c
@@ -20,6 +20,11 @@
 #include <math.h>
 #include "babl-internal.h"
 
+#ifndef HAVE_SRANDOM
+#define srandom srand
+#define random  rand
+#endif
+
 int ITERATIONS = 2;
 #define  N_PIXELS (512*1024)  // a too small batch makes the test set live
                                // in l2 cache skewing results
diff --git a/tools/babl-gen-test-pixels.c b/tools/babl-gen-test-pixels.c
index 59e3176..12b8040 100644
--- a/tools/babl-gen-test-pixels.c
+++ b/tools/babl-gen-test-pixels.c
@@ -20,6 +20,11 @@
 #include <stdlib.h>
 #include <stdio.h>
 
+#ifndef HAVE_SRANDOM
+#define srandom srand
+#define random  rand
+#endif
+
 #define BABL_PATH_NUM_TEST_PIXELS       3072
 #define BABL_CONVERSION_NUM_TEST_PIXELS 128
 #define BABL_FROMAT_NUM_TEST_PIXELS     256