dumpyara.sh: explicitly check the folders generated by fsck.erofs

[Shra1V32]

There's one case with fsck.erofs where it generates folder but fails to extract. The script will now check whether the generated folders are empty or not.

[OneNormalUsername]

Thank you for this PR. For testing purposes, would you be able to share with which image and which firmware this happens?

[Shra1V32]

1. All the dynamic partitioned images extracted from super.

2. Needs an additional commit from the Firmware_extractor, AndroidDumps/Firmware_extractor@fbcc9a6

https://sourceforge.net/projects/xiaomi-eu-multilang-miui-roms/files/xiaomi.eu/MIUI-WEEKLY-RELEASES/V14.0.23.6.5.DEV/xiaomi.eu_multi_MUNCH_V14.0.23.6.5.DEV_v14-13.zip/download

[OneNormalUsername]

xiaomi.eu is a custom ROM though, is there any stock ROM with split sparse super images?

[Shra1V32]

I understand that xiaomi.eu is a custom ROM and yeah, I've never any OEM do that as per my knowledge. But any OEM may also generate using simg2simg. This PR is intended just for the test case nothing else, Just wanted to give a try. What I liked is that, xiaomi.eu is able to make hybrid packages where split sparse can be flashed through recovery & even fastboot with the same files.