GEOS-Chem submod update: Merge PR #2061 Add units in commonIncludeVar…

…s.H)

This commit informs the GCHP superproject about the following
commits that were pushed to the GitHub geoschem/geos-chem repository:

60c682c32 Merge PR #2061 (Add missing units in commonIncludeVars.H)

This updates comments in KPP/fulllchem/commonIncludeVars.H with
the proper units of each quantity.

Signed-off-by: Bob Yantosca <yantosca@seas.harvard.edu>