* ncl: Fix temp directory
Currently, ncl is configured using a transient temp directory. This
leads to warnings such as this when executing ncl later on:
warning:"/tmp/ncl_ncar_xxxxxx" tmp dir does not exist or is not writable:
NCL functionality may be limited -- check TMPDIR environment variable
As this also breaks some functionality, use the system temp directory
instead (typically /tmp).
* ncl: Depend on esmf
esmf is required for some ncl scripts (such as ESMF_regridding.ncl).
4065ef2106