Upgrade pre-jb-mr2 releases to tzdata2013d.

From the release notes:

  Changes affecting future time stamps:

    Morocco's midsummer transitions this year are July 7 and August 10,
    not July 9 and August 8.  (Thanks to Andrew Paprocki.)

    Israel now falls back on the last Sunday of October.
    (Thanks to Ephraim Silverberg.)

  Changes affecting past time stamps:

    Specify Jerusalem's location more precisely; this changes the pre-1880
    times by 2 s.

  Changing affecting metadata only:

    Fix typos in the entries for country codes BQ and SX.

Change-Id: I8caa139f0eecbe038643df43a27088278c6185cd

libc/zoneinfo/zoneinfo.version

@@ -1 +1 @@
-2012c
+2013d

linker/linker.c

@@ -159,7 +159,7 @@ const char *linker_get_error(void)
  * This function is an empty stub where GDB locates a breakpoint to get notified
  * about linker activity.
  */
-extern void __attribute__((noinline)) rtld_db_dlactivity(void);
+extern void __attribute__((noinline)) __attribute__((visibility("default"))) rtld_db_dlactivity(void);
 
 static struct r_debug _r_debug = {1, NULL, &rtld_db_dlactivity,
                                   RT_CONSISTENT, 0};

linker/rt.c

@@ -28,9 +28,9 @@
 
 /*
  * This function is an empty stub where GDB locates a breakpoint to get notified
- * about linker activity.
+ * about linker activity.  It canʼt be inlined away, canʼt be hidden.
  */
-void __attribute__((noinline)) rtld_db_dlactivity(void)
+void __attribute__((noinline)) __attribute__((visibility("default"))) rtld_db_dlactivity(void)
 {
 }