v12: More updates to make L72 like v11

[mathomp4]

Per @sdrabenh, in GOCART we have a couple files that need to be changed for L72:

ESMF/GOCART2G_GridComp/SS2G_GridComp/SS2G_instance_SS.rc
31-emission_scale:  0.600 0.525 0.450 0.400 0.375 0.350   # L181 global scaling factor
32:#emission_scale: 0.613 0.613 0.613 0.429 0.429 0.429   # L072 global scaling factor

ESMF/GOCART2G_GridComp/DU2G_GridComp/DU2G_instance_DU.rc
20-Ch_DU:  0.20 0.15 0.10 0.09 0.080 0.070 # L181 values for (a,b,c,d,e,f)
21:#Ch_DU: 0.30 0.30 0.11 0.11 0.110 0.088 # L072 values for (a,b,c,d,e,f)

By default we point to the L181 ones, but for L72, we need to use the others.

Also: Fix a bug in AGCM.rc.tmpl