---------------------- 出现下面错误，再次执行 m -j32 iso_img 即可解决, 但不彻底，启动android时会出错
depmod: ERROR: Found 3 modules in dependency cycles!
depmod: ERROR: Cycle detected: udc_core -> libcomposite -> configfs
depmod: ERROR: Cycle detected: udc_core -> libcomposite -> udc_core
/opt/android-x86/cm-13-kiwi/kernel/generic/android_x86_64/Makefile:1019: recipe for target '_modinst_post' failed
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vim kernel/generic/android_x86_64/Makefile
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modules_install: _modinst_ _modinst_post
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