pmbootstrap flasher boot: fix fastboot arg (-c)
Replace -c with --cmdline, to adjust to the same change in fastboot: https://android.googlesource.com/platform/system/core/+/577e8b44b6cfa8f44cb56dea35aa582820454d56
Replace -c with --cmdline, to adjust to the same change in fastboot: https://android.googlesource.com/platform/system/core/+/577e8b44b6cfa8f44cb56dea35aa582820454d56