HPCC-9149 Add details about Eclcc Options

Signed-off-by: JamesDeFabia <James.Defabia@LexisNexis.com>
Merge pull request #4281 from JamesDeFabia/hpcc9149_EclccOtions

HPCC-9149 Add details about Eclcc Options

Reviewed-By Richard Chapman <rchapman@hpccplatform.com>