Change in coreboot[master]: util/cbfstool: Update Makefiles

[9elements QA (Code Review)]

9elements QA has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/50848 )

Change subject: util/cbfstool: Update Makefiles
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Patch Set 2:

Automatic boot test returned (PASS/FAIL/TOTAL): 7 / 1 / 8
PASS : x86_32  "ThinkPad T500" and payload SeaBIOS : https://lava.9esec.io/r/45546
PASS : x86_32  "HP Z220 SFF Workstation" and payload LinuxBoot_BB_kexec : https://lava.9esec.io/r/45545
FAIL : x86_32  "HP Compaq 8200 Elite SFF PC" and payload SeaBIOS : https://lava.9esec.io/r/45544
PASS : x86_32  "QEMU x86 q35/ich9" and payload TianoCore : https://lava.9esec.io/r/45543
PASS : x86_32  "QEMU x86 q35/ich9" and payload SeaBIOS : https://lava.9esec.io/r/45542
PASS : x86_64  "QEMU x86 i440fx/piix4" and payload SeaBIOS : https://lava.9esec.io/r/45541
PASS : x86_32  "QEMU x86 i440fx/piix4" and payload SeaBIOS : https://lava.9esec.io/r/45540
PASS : aarch64 "QEMU AArch64" and payload LinuxBoot_u-root_kexec : https://lava.9esec.io/r/45539

Please note: This test is under development and might not be accurate at all!