coreos/coreos-overlay — pull request #933 by vcaputo (2014-10-22 00:55:16+00:00)
Title: libchrome: Fix append bug in file_util::ReadFileToString()

This commit reproduces in the form of an epatch an upstream libchrome
fix to prevent ReadFileToString() from appending to the provided output
string.

Bug was observed in update_engine alephversion pref maintenance