am cb9450e1: Use f_bavail to calculate free space

* commit 'cb9450e11337700907a7a5ec290902196c74fa9b':
  Use f_bavail to calculate free space
This commit is contained in:
caozhiyuan 2015-06-26 20:59:23 +00:00 committed by Android Git Automerger
commit b102404d1d

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