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
GetAddressOfData__FRiRPvT1 @ 1 NONAME R3UNUSED ; GetAddressOfData(int &, void *&, void *&)
TestDataSize @ 2 NONAME ; (null)
WritableTestData @ 3 NONAME ; (null)
PointerToStaticData @ 4 NONAME ; (null)
PointerToWritableData @ 5 NONAME ; (null)