Update ChangeLog with issue descriptions

Author: jimmielin

doc/ChangeLog

@@ -7,18 +7,18 @@ One-line Summary: Phase 1 of rk_stratiform CCPPization; CCPPize cldfrc
 Github PR URL: https://github.com/ESCOMP/CAM/pull/1271
 
 Purpose of changes (include the issue number and title text for each relevant GitHub issue):
-- Closes #1267
+- Closes #1267 - Convert cloud_fraction/cldfrc to CCPP and move to atmospheric_physics
 - Fixes #1274 for incorrect vertical dimension of `tphysbc_cmfmc` in snapshots
-- Partial completion of https://github.com/ESCOMP/CAM/issues/1267; most code has been moved to atmospheric_physics.
+- Partial completion of #1225 - Convert rk_stratiform_tend (CAM4) to CCPP and move to atmos_phys; most code has been moved to atmospheric_physics.
 
 Describe any changes made to build system: N/A
 
 Describe any changes made to the namelist:
 - build-namelist updated to add `rk_stratiform_tend` snapshot point
 
-List any changes to the defaults for the boundary datasets:
+List any changes to the defaults for the boundary datasets: N/A
 
-Describe any substantial timing or memory changes:
+Describe any substantial timing or memory changes: N/A
 
 Code reviewed by: nusbaume, cacraig
 
@@ -109,7 +109,8 @@ tag: N/A
 
 Summarize any changes to answers:
   CAM4 round-off changes in heat flux due to rearrangement of terms / cleanup in CCPPization
-  will lead to greater than round-off changes after a few timesteps due to chaotic system.
+  will lead to greater than round-off changes for CAM4 compsets only after a few timesteps
+  due to chaotic nature of system.
 
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