tint: Use the current time as random seed

Previously the random seed was fixed, which led to the same sequence of
blocks for each run.

Now that libpayload has time(), no change is needed in the function
rand_init() of tint.

Change-Id: I2e482bbb9d33cdbbf3c15916458329f99fbc4450
Signed-off-by: Nicola Corna <nicola@corna.info>
Reviewed-on: https://review.coreboot.org/20980
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

payloads/external/tint/libpayload_tint.patch

@@ -1,16 +1,15 @@
 diff -rupN tint-0.03b/config.h tint/config.h
 --- tint-0.03b/config.h	2001-12-08 00:03:24.000000000 +0100
 +++ tint/config.h	2016-05-27 14:47:15.797402090 +0200
-@@ -29,7 +29,16 @@
+@@ -29,7 +29,15 @@
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
 +#include <libpayload.h>
 +#include <curses.h>
-+#define random(x) rand(x)
-+#define srandom(x) srand(x)
-+#define curs_set(x)
 +
++#define curs_set(x)
++#define USE_RAND
 +
  /* Score file */
 +#if 0
@@ -939,19 +938,7 @@ diff -rupN tint-0.03b/utils.c tint/utils.c
  
  /*
   * Initialize random number generator
-@@ -41,8 +43,11 @@ void rand_init ()
- #ifdef USE_RAND
-    srand (time (NULL));
- #else
-+#if 0
-    srandom (time (NULL));
- #endif
-+   srandom (123);
-+#endif
- }
- 
- /*
-@@ -61,6 +66,7 @@ int rand_value (int range)
+@@ -61,6 +63,7 @@ int rand_value (int range)
   * Convert an str to long. Returns TRUE if successful,
   * FALSE otherwise.
   */
@@ -959,7 +946,7 @@ diff -rupN tint-0.03b/utils.c tint/utils.c
  bool str2int (int *i,const char *str)
  {
     char *endptr;
-@@ -69,3 +75,4 @@ bool str2int (int *i,const char *str)
+@@ -69,3 +72,4 @@ bool str2int (int *i,const char *str)
     return TRUE;
  }