Use "${CMAKE_COMMAND}" -E env for setting env vars
Use "${CMAKE_COMMAND}" -E env for setting env vars

The "env" command is only available on unix systems. If we want
to generalize it to work on Windows, we need to use
"${CMAKE_COMMAND}" -E env.

Signed-off-by: Patrick Avery <743342299f279e7a8c3ff5eb40671fce3e95f13a@kitware.com>

OpenChemistry/tomviz-superbuild,cjh1/tomviz-superbuild,OpenChemistry/tomviz-superbuild,cjh1/tomviz-superbuild