DFU TEST CASE DESCRIPTION:The prerequisites for running this script are assured by dfu_gadget_test_init.sh.In this file user is able to generate their own set of test files by alteringthe default set of TEST_FILES_SIZES variable.The dfu_gadget_test_init.sh would generate test images only if they are notalready generated.Moreover, on a target device the "dfu_alt_info" env variable should be extendedto have "dfu_test.bin fat 0 6;" \ entry ([1]). For reference please consult theconfig file for TRATS/TRATS2 devices (./include/configs/trats{2}.h)One can use fat, ext4 or any other supported file system, which can becreated in a convenient way with exporting partitions via UMS (ums 0 mmc 0)and using standard tools on host (like mkfs.ext4).Example usage:1. On the target: env default -a dfu 0 mmc 02. On the host: ./dfu_gadget_test.sh 11 [test_file]where 11 is the mumber of alt setting corresponding to entry [1] and [test_file]is an optional parameter, with which one can explicitly indicate the test fileto be used.The number of the alt setting entry can be obtained with dfu-util -l command.In its output one should look for the 'name="dfu_test1.bin"' and correspondingalt=11.