Update ChangeLog for 2.1.1.

jemalloc/ChangeLog

@@ -6,6 +6,14 @@ found in the git revision history:
     http://www.canonware.com/cgi-bin/gitweb.cgi?p=jemalloc.git
     git://canonware.com/jemalloc.git
 
+* 2.1.1
+
+  Bug Fixes:
+  - Fix aligned huge reallocation (affected allocm()).
+  - Fix the ALLOCM_LG_ALIGN macro definition.
+  - Fix a heap dumping deadlock.
+  - Fix a "thread.arena" mallctl bug.
+
 * 2.1.0
 
   This version incorporates some optimizations that can't quite be considered
@@ -27,7 +35,7 @@ found in the git revision history:
 
   Bug fixes:
   - Fix a race condition in heap profiling that could cause undefined behavior
-    if opt.prof_accum were disabled.
+    if "opt.prof_accum" were disabled.
   - Add missing mutex unlocks for some OOM error paths in the heap profiling
     code.
   - Fix a compilation error for non-C99 builds.