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.
SECTION_COMMANDS
oneoff \os\kernelhwsrv\kerneltest\f32test\loader bldmake bldfiles
oneoff \os\kernelhwsrv\kerneltest\f32test\loader abld test makefile
oneoff \os\kernelhwsrv\kerneltest\f32test\loader abld test library
oneoff \os\kernelhwsrv\kerneltest\f32test\loader abld -k test target