[cairo] Road to pixman 0.16.0

[Jonathan Morton]

> * ARM fixes
> 
>   - The current code is not releasable.
> 
>     Unless I hear otherwise, I'll just apply Siarhei's fixes after
>     they are updated for code style issues.
> 
>   - Build fixes for older CPUs:
>         
>         https://bugs.freedesktop.org/show_bug.cgi?id=22692
> 
>     Siarhei says it's reasonable, so unless I hear otherwise, I'll
>     apply that as well.
> 
> * Merge the blitter-test code.
> 
>   - Some changes are needed; see other mail.
> 
> * Fix bugs reported by the blitter-test
> 
>   - The discrepancies between the architecture specific code and the
>     general C code should be tracked down and fixed.
> 
>   - It should be tracked down why enabling component-alpha causes
>     crashes.

I'm probably not going to have time to look into those problems this
week, because I am on another urgent project - but I'll have a look as
soon as I can.  It is of course important that things work properly as
well as quickly.

-- 
------
From: Jonathan Morton
      jonathan.morton at movial.com