cmake guideline updates

[Rex Dieter]

Kalev Lember wrote:

> Fedora KDE packaging guidelines have evolved over time, but official
> Fedora cmake guidelines [1] are still the same that were originally
> accepted in 2007.
> 
> I would like to propose a few changes to the example cmake spec file to
> bring it more in line with KDE spec files:

agreed.

...
> Perhaps it'd be better to completely remove -DBUILD_SHARED_LIBS:BOOL=ON
> from the default %cmake macro?

also +1

-- Rex