android9.0 lunch时候提示 ANDROID_BUILD_TOP error

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Set cache size limit to 100.0 GB
rm: cannot remove 'out': Is a directory
buildspec.mk:4: error: ANDROID_BUILD_TOP is obsolete. Use '.' instead. See https://android.googlesource.com/platform/build/+/master/Changes.md#ANDROID_BUILD_TOP.
18:43:30 dumpvars failed with: exit status 1