Update changelog

Change-Id: Ib284990fd819c71411617c3d995178181af9fc4d
diff --git a/docs/source/version_history.rst b/docs/source/version_history.rst
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@@ -30,6 +30,8 @@
 
 Bug Fixes & Minor Changes
 -------------------------
+#. Fix missing gflags imported target definition in
+   CeresConfig.cmake. (Alex Stewart)
 #. Make gflags a public dependency of Ceres if it and glog are
    found. (Alex Stewart)
 #. Add support for glog exported CMake target. (Alex Stewart)