Log failed load_properties_from_file calls.

These events are _somewhat_ normal, in that not all devices have all
partitions, but not logging anything makes it unnecessarily hard for
folks to debug simple failures.

Bug: http://b/31186390
Test: booted, checked dmesg
Change-Id: I403377c585ea35cfe73b0bed9443b75e3a84dc8d
1 file changed