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Build shell script usage:

image type:CCO
shell command:
    ./build_flash_cco.sh : build all customs flash bin
    ./build_flash_cco.sh [custom name] : build one custom flash bin

image type:STA
shell command:
    ./build_flash_sta.sh : build all customs flash bin
    ./build_flash_sta.sh [custom name] : build one custom flash bin

image type:FTM
shell command:
    ./build_flash_ftm.sh : build wqrd ftm flash bin

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Then, all custom bin will generated at the PATH:
    Mainline/tools/gen_img/ .

And the bin file name format:
    SG-(custom name)(image type)-(version id)-(git commitid)-(time).bin .

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If you want to add a new custom, follow the step below:
1. add a new custom cfg file at the path:
        Mainline/build/cfg ,
   follow the name format:
        (custom)_cco.cfg (custom)_sta.cfg (custom)_iic.cfg,
   such as htzd_cco.cfg htzd_sta.cfg htzd_iic.cfg.

   Please make sure the cfg file corrent, and avoid name repetition with others.

2. add a new custom pib.bin and oem.bin at the path:
        Mainline/tools/pib/ ,
   follow the name format:
        (CUSTOM)(image type)01_PIB.bin (CUSTOM)(image type)01_OEM.bin
   such as HTZDCCO01_PIB.bin HTZDIIC01_PIB.bin HTZDSTA01_PIB.bin.
   Avoid name repetition, too.

3. modify the shell script ./build_flash_xxx.sh
   add the custom name into "CUSTOM_STRING" and allocate a XXX_ENV_ID for it

4. FTM mode only used for WQRD.