Merge remote-tracking branch 'mreitz/tags/pull-block-for-kevin-2016-07-05-v2' into...

A block patch for the block queue

# gpg: Signature made Tue Jul  5 16:54:22 2016 CEST
# gpg:                using RSA key 0x3BB14202E838ACAD
# gpg: Good signature from "Max Reitz <[email protected]>"
# Primary key fingerprint: 91BE B60A 30DB 3E88 57D1  1829 F407 DB00 61D5 CF40
#      Subkey fingerprint: 58B3 81CE 2DC8 9CF9 9730  EE64 3BB1 4202 E838 ACAD

* mreitz/tags/pull-block-for-kevin-2016-07-05-v2:
  block/qcow2: Don't use cpu_to_*w()

Signed-off-by: Kevin Wolf <[email protected]>