[cairo] Testsuite changes this week

[Bryce Harrington]

                   git     git     git     git      git      git
                  05/03   05/12   06/09   07/08    07/21    07/30
-----------------------------------------------------------------
Tests run:        24838   24838   24813   24812    24839    24838
Passed:           15774   15743   16015   16001    16024    15892
Failed:            6476    6505    6226    6224     6228     6369
Expected Failed:    332     332     315     332      332      332
Error:                1       0       1       1        0        0
Crashed:             32      35      33      31       32       22
Untested:          2223    2223    2223    2223     2223     2223
Total:            24838   24838   24813   24812    24839    24838

Here's the tests that changed results since the previous run:

  http://www.bryceharrington.org/Cairo/changes-20140721-to-20140730-trent.txt

To get a flavor for the new failures, they comprise:

  PASS -> FAIL   pixman-downscale-best-*
  PASS -> FAIL   recording-surface-extend-*
  PASS -> FAIL   recording-surface-over-*
  PASS -> FAIL   recording-surface-source-*
  PASS -> FAIL   scale-down-source-surface-paint.svg*
  PASS -> FAIL   surface-pattern-scale-down*

There were five patches applied to the tree during this period; four of
the five don't really affect code behavior, so I assume all of these are
due to the fifth patch, which was the downscaling change.  At least in
the case of the pixman-downscale-* tests, the truth images were taken
from the old code's output, so these simply need to be checked by
eyeball and then the truth images updated.

Bryce