Add changelog

Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

changelog.md

+# Changelog for [`old-time` package](http://hackage.haskell.org/package/old-time)
+
+## 1.1.0.2  *Mar 2014*
+
+  * Bundled with GHC 7.8.1
+
+  * Supports `base-4.7.0.0`
+
+  * Remove NHC98-specific code
+
+  * Update to Cabal 1.10 format
+
+## 1.1.0.1  *Sep 2012*
+
+  * Bundled with GHC 7.6.1
+
+  * Don't include deprecated `<sys/timeb.h>` on FreeBSD
+
+  * Fix `gettimeofday(2)` call on Win64

old-time.cabal

@@ -18,6 +18,7 @@ description:
 
 extra-source-files:
     aclocal.m4
+    changelog.md
     config.guess
     config.sub
     configure