GEOS-Chem submod update: Merge hotfix from PR #2363 atop PR #2359

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

e61a51064 Merge GCHP hotfix from PR #2363 on top of PR #2359

This PR implements a hotfix for an issue that had caused GCHP
cloud benchmarks to fail.

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