Updates for Spack Support, Round 2

Due to insufficient grepping on my part, some remnants of the
"non-canonical" CMake still remain. Apparently these were not necessary
changes for Spack, but they are changes that unify the CMake style of
GEOS to be more like "correct" CMake.

In this go-around, it is mainly finding `INC_ESMF` which I apparently
forgot to grep for last time (I was focused on NetCDF), and some
non-canonical OpenMP calls.

See GEOS-ESM/GEOSgcm#387 for the meta-issue.

CMakeLists.txt

@@ -7,10 +7,9 @@ set (srcs
   TR_GridCompMod.F90
   )
 
-esma_add_library (${this} 
-   SRCS ${srcs} 
-   DEPENDENCIES MAPL GMAO_mpeu Chem_Shared GEOS_Shared
-   INCLUDES ${INC_ESMF})
+esma_add_library (${this}
+   SRCS ${srcs}
+   DEPENDENCIES MAPL GMAO_mpeu Chem_Shared GEOS_Shared esmf)
 
 #esma_generate_gocart_code (${this} -F)