configs/rtl8721csm : Support specific partition flash in dbuild
Add options to .flashspec.xml to flash a binary to specific partition in dbuild
</executors>
<options>
<option desc="Flash all binaries and images">ALL</option>
+ <option desc="Flash TizenRT km0 bootloader">KM0_BL</option>
+ <option desc="Flash TizenRT km4 bootloader">KM4_BL</option>
+ <option desc="Flash TizenRT kernel">KERNEL</option>
+ <option desc="Flash TizenRT userfs">USERFS</option>
+ <option desc="Flash TizenRT ota">OTA</option>
</options>
</flash>
