Merge remote branch 'cros/upstream' into autotest-rebase

Merged to upstream trunk@5066, from trunk@4749.

There is no way I could enlist each individual CL from the upstream here since it will blow up the changelist description field.

BUG=
TEST=
Had patched this CL into a fresh cut client to avoid any side effect.
run_remote_test bvt from both emerged location and third_party/autotest/file.

Both test passed!

We should also keep any eye on this to see how it gets propagated into cautotest server.
TBR=dalecurtis

Change-Id: I72f2bc7a9de530178484aea1bfb5ace68bcad029
diff --git a/client/bin/partition.py b/client/bin/partition.py
index 355d1b3..7381f75 100644
--- a/client/bin/partition.py
+++ b/client/bin/partition.py
@@ -185,7 +185,7 @@
     mount_info = set()
     for p in partition_list:
         try:
-            uuid = utils.system_output('blkid -s UUID -o value %s' % p.device)
+            uuid = utils.system_output('blkid -p -s UUID -o value %s' % p.device)
         except error.CmdError:
             # fall back to using the partition
             uuid = p.device