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
_ZN3HCR10GetLinAddrERKNS_10TSettingIdERm @ 1 NONAME
_ZN3HCR12FindSettingsEmiPmPNS_12TSettingTypeEPt @ 2 NONAME
_ZN3HCR12FindSettingsEmimmPmPNS_12TSettingTypeEPt @ 3 NONAME
_ZN3HCR14GetTypeAndSizeERKNS_10TSettingIdERNS_12TSettingTypeERt @ 4 NONAME
_ZN3HCR15GetWordSettingsEiPKNS_10SSettingIdEPlPNS_12TSettingTypeEPi @ 5 NONAME
_ZN3HCR25FindNumSettingsInCategoryEm @ 6 NONAME
_ZN3HCR6GetIntERKNS_10TSettingIdERa @ 7 NONAME
_ZN3HCR6GetIntERKNS_10TSettingIdERl @ 8 NONAME
_ZN3HCR6GetIntERKNS_10TSettingIdERs @ 9 NONAME
_ZN3HCR6GetIntERKNS_10TSettingIdERx @ 10 NONAME
_ZN3HCR7GetBoolERKNS_10TSettingIdERi @ 11 NONAME
_ZN3HCR7GetDataERKNS_10TSettingIdER5TDes8 @ 12 NONAME
_ZN3HCR7GetDataERKNS_10TSettingIdEtPhRt @ 13 NONAME
_ZN3HCR7GetUIntERKNS_10TSettingIdERh @ 14 NONAME
_ZN3HCR7GetUIntERKNS_10TSettingIdERm @ 15 NONAME
_ZN3HCR7GetUIntERKNS_10TSettingIdERt @ 16 NONAME
_ZN3HCR7GetUIntERKNS_10TSettingIdERy @ 17 NONAME
_ZN3HCR8GetArrayERKNS_10TSettingIdEtPlRt @ 18 NONAME
_ZN3HCR8GetArrayERKNS_10TSettingIdEtPmRt @ 19 NONAME
_ZN3HCR9GetStringERKNS_10TSettingIdER5TDes8 @ 20 NONAME
_ZN3HCR9GetStringERKNS_10TSettingIdEtPhRt @ 21 NONAME