Enhance the base/rom extension to generate the symbol file of the rom built.
The symbol file is placed in epoc32/rom/<baseport_name>, along with the rom log and final oby file.
# component name "File Server Tests"
component base_f32test
source \sf\os\kernelhwsrv\kerneltest\f32test
binary \sf\os\kernelhwsrv\kerneltest\f32test\group all
exports \sf\os\kernelhwsrv\kerneltest\f32test\group
notes_source \component_defs\release.src
ipr T