Multi build example
-------------------
when you specify -f 9199 on the command line:
9199\filelist.ini
is parsed instead of data\filelist.ini

Also the bin directory is used from
9199\bin\
instead of bin\
allowing us to create multiple builds without multiple instances or
rebuilds/hex edits/hacks of the main app.

The example provided is the last version of 9199 patch set from dash launch and
   other files to build freeboot 9199
   
example use:
------------
fbbuild -c xenon -f 9199 -d myxenon x9199out.bin

-c xenon    : specifies xenon patchset and bootloaders
-f 9199     : use .\9199\filelist.ini, and .\9199\ for firmware files, .\9199\bin\ for rebooter files
-d myxenon  : use .\myxenon for per build files (cpu key, keyvault, security files etc.)
x9199out.bin: override auto generated name and produce .\x9199out.bin as the final NAND image
