Update Changelog.
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+2019-04-16:
+  Merged changes to install libraries in the correct place when
+  using 64-bit libraries.
+  Contributed by Jason Zaman <jasonzaman@gmail.com> and (independently)
+    Dan Church (https://github.com/h3xx)
+
 2019-03-11:
   Use relative includes in the library. This shouldn't have any visible effect
   for consumers of the library.