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.
<LDD name="eusbcsc">
<ENDPOINTS>30</ENDPOINTS>
<SOFTCONNECT>Y</SOFTCONNECT>
<SELFPOWER>Y</SELFPOWER>
<REMOTEWAKEUP>N</REMOTEWAKEUP>
<HIGHSPEED>Y</HIGHSPEED>
<FEATURES>0</FEATURES>
<MAXPOWER>50</MAXPOWER>
<EPSTALL>Y</EPSTALL>
<SPEC>0x200</SPEC>
<VID>0xE22</VID>
<PID>0x1110</PID>
<RELEASE>0x305</RELEASE>
<PRODUCT>HSDevice</PRODUCT>
<INTERFACE>
<CLASS>255</CLASS>
<SUBCLASS>255</SUBCLASS>
<PROTOCOL>255</PROTOCOL>
<DESCRIPTOR>"T_USB Test Interface 0 (Default Setting 0)"</DESCRIPTOR>
<ENDPOINT type="BULK" direction="IN">
<BUFFERSIZE>128000</BUFFERSIZE>
<SIZE>512</SIZE>
<DMA>N</DMA>
</ENDPOINT>
<ENDPOINT type="BULK" direction="OUT">
<BUFFERSIZE>128000</BUFFERSIZE>
<SIZE>512</SIZE>
<DMA>N</DMA>
</ENDPOINT>
<ENDPOINT type="INTERRUPT" direction="IN">
<BUFFERSIZE>128000</BUFFERSIZE>
<INTERVAL>1</INTERVAL>
<SIZE>64</SIZE>
<DMA>N</DMA>
</ENDPOINT>
<ENDPOINT type="INTERRUPT" direction="OUT">
<BUFFERSIZE>128000</BUFFERSIZE>
<INTERVAL>1</INTERVAL>
<SIZE>64</SIZE>
<DMA>N</DMA>
</ENDPOINT>
<ENDPOINT type="BULK" direction="IN">
<BUFFERSIZE>128000</BUFFERSIZE>
<SIZE>512</SIZE>
<DMA>N</DMA>
</ENDPOINT>
</INTERFACE>
<ALT_SETTING>
<CLASS>255</CLASS>
<SUBCLASS>255</SUBCLASS>
<PROTOCOL>255</PROTOCOL>
<DESCRIPTOR>"T_USB Test Interface 0 (Alternate Setting 1)"</DESCRIPTOR>
<ENDPOINT type="INTERRUPT" direction="IN">
<BUFFERSIZE>128000</BUFFERSIZE>
<INTERVAL>1</INTERVAL>
<SIZE>64</SIZE>
<DMA>N</DMA>
</ENDPOINT>
<ENDPOINT type="INTERRUPT" direction="OUT">
<BUFFERSIZE>128000</BUFFERSIZE>
<INTERVAL>1</INTERVAL>
<SIZE>64</SIZE>
<DMA>N</DMA>
</ENDPOINT>
<ENDPOINT type="BULK" direction="IN">
<SIZE>512</SIZE>
<DMA>N</DMA>
</ENDPOINT>
<ENDPOINT type="BULK" direction="OUT">
<BUFFERSIZE>128000</BUFFERSIZE>
<SIZE>512</SIZE>
<DMA>N</DMA>
</ENDPOINT>
<ENDPOINT type="BULK" direction="OUT">
<BUFFERSIZE>128000</BUFFERSIZE>
<SIZE>512</SIZE>
<DMA>N</DMA>
</ENDPOINT>
</ALT_SETTING>
<ALT_SETTING>
<CLASS>255</CLASS>
<SUBCLASS>255</SUBCLASS>
<PROTOCOL>255</PROTOCOL>
<DESCRIPTOR>"T_USB Test Interface 0 (Alternate Setting 2)"</DESCRIPTOR>
<ENDPOINT type="BULK" direction="IN">
<BUFFERSIZE>128000</BUFFERSIZE>
<SIZE>512</SIZE>
<DMA>N</DMA>
</ENDPOINT>
<ENDPOINT type="BULK" direction="OUT">
<BUFFERSIZE>128000</BUFFERSIZE>
<SIZE>512</SIZE>
<DMA>N</DMA>
</ENDPOINT>
<ENDPOINT type="BULK" direction="OUT">
<BUFFERSIZE>128000</BUFFERSIZE>
<SIZE>512</SIZE>
<DMA>N</DMA>
</ENDPOINT>
<ENDPOINT type="INTERRUPT" direction="IN">
<BUFFERSIZE>128000</BUFFERSIZE>
<SIZE>64</SIZE>
<INTERVAL>1</INTERVAL>
<DMA>N</DMA>
</ENDPOINT>
<ENDPOINT type="ISOCHRONOUS" direction="OUT">
<BUFFERSIZE>128000</BUFFERSIZE>
<SIZE>512</SIZE>
<INTERVAL>1</INTERVAL>
<DMA>N</DMA>
</ENDPOINT>
</ALT_SETTING>
</LDD>