Merge branch 'bishtgautam/lnd/narrm-lulc' into next (PR #6477)

A LULC file for 1850-2015 at r025 is added.

[BFB]

Author: peterdschwartz

components/elm/bld/namelist_files/use_cases/20thC_CMIP6_transient.xml

@@ -38,6 +38,7 @@
 <finidat hgrid="ne30np4" mask="oEC60to30v3">lnd/clm2/initdata_map/20180316.DECKv1b_A1.ne30_oEC.edison.clm2.r.1980-01-01-00000.8575c3f_c20190904.nc</finidat>
 
 <flanduse_timeseries hgrid="r05">lnd/clm2/surfdata_map/landuse.timeseries_0.5x0.5_hist_simyr1850-2015_c240308.nc</flanduse_timeseries>
+<flanduse_timeseries hgrid="r025" use_crop=".false." >lnd/clm2/surfdata_map/landuse.timeseries_0.25x0.25_hist_simyr1850-2015_c240125.nc</flanduse_timeseries>
 
 <flanduse_timeseries hgrid="ne120np4">lnd/clm2/surfdata_map/landuse.timeseries_ne120np4_historical_simyr1850-2015_c190904.nc</flanduse_timeseries>