[OE-core] cairo: Clean up packaging and fix warnings

[Phil Blundell]

On Fri, 2011-07-01 at 10:15 +0100, Richard Purdie wrote:
> +PACKAGES =+ "libcairo-gobject2 libcairo-script-interpreter2 cairo-perf-utils"

I guess those can/should just be "libcairo-gobject" and
"libcairo-script-interpreter" now as well.

>  SUMMARY_libcairo2 = "The Cairo 2D vector graphics library"
>  DESCRIPTION_libcairo2 = "Cairo is a multi-platform library providing anti-aliased \

Presumably those also want changing to ${PN} or some such.

p.