Fix chunk accounting related to triggering gdump profiles.

Fix in place huge reallocation to update the chunk counters that are
used for triggering gdump profiles.
diff --git a/ChangeLog b/ChangeLog
index 68dedfa..a939094 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -23,6 +23,7 @@
     to avoid unfortunate interactions during fork(2).  (@jasone)
 
   Bug fixes:
+  - Fix chunk accounting related to triggering gdump profiles.  (@jasone)
   - Link against librt for clock_gettime(2) if glibc < 2.17.  (@jasone)
   - Scale leak report summary according to sampling probability.  (@jasone)