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remove lists:
1. Architectures except x86,ARM(ARM从4.14开始支持),powerpc（数平在用powerpc, 没准哪天需要支持）.
2. CAN bus.
3. ALSA drivers, ASoC.
4. all Android files.
5. Bluetooh.
6. i40e & i40evf (替换到sourceforge版本，无需从上游backport变更).
replace .gitignore directly