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.
EXPORTS
_Z19CreateLogicalDevicev @ 1 NONAME
_Z22ExportMultiplyFunctionjj @ 2 NONAME
_ZTI14DExportChannel @ 3 NONAME
_ZTI14DExportFactory @ 4 NONAME
_ZTV14DExportChannel @ 5 NONAME
_ZTV14DExportFactory @ 6 NONAME