ChangeLog update

doc/ChangeLog

@@ -8,19 +8,22 @@ Github PR URL: https://github.com/ESCOMP/CAM/pull/688
 
 Purpose of changes (include the issue number and title text for each relevant GitHub issue):
 
-Describe any changes made to build system:
+ Add the capability to generate frontal gravity wave forcings when the MPAS dynamical core
+ is used.  See github issue #400.
 
-Describe any changes made to the namelist:
+Describe any changes made to build system: N/A
 
-List any changes to the defaults for the boundary datasets:
+Describe any changes made to the namelist: N/A
 
-Describe any substantial timing or memory changes:
+List any changes to the defaults for the boundary datasets: N/A
 
-Code reviewed by:
+Describe any substantial timing or memory changes: N/A
 
-List all files eliminated:
+Code reviewed by: cacraigucar brian-eaton jtruesdal nusbaume
 
-List all files added and what they do:
+List all files eliminated: N/A
+
+List all files added and what they do: N/A
 
 List all existing files that have been modified, and describe the changes:
 M	bld/namelist_files/namelist_defaults_cam.xml