[OE-core] [RFC PATCH] cmake: use Ninja backend instead of Make

[Randy MacLeod]

On 2018-01-17 04:43 PM, Burton, Ross wrote:
> There appears to be a small number of upstreams that break with ninja, 
> so I'll rework this patch so that the backend is an option but default 
> to Ninja.

The only failure that involved a cmake based package was piglit
for my qemux86-64 world build.

It didn't install:
   make: Entering directory 
'/.../tmp-glibc/work/core2-64-wrs-linux/piglit/1.0+gitrAUTOINC+c8f4fd9eeb-r0/build'
make: *** No rule to make target 'install/strip'.  Stop.

so that might not be related to this change. I haven't manually done
a world build on master recently.

As expected using ninja for the back-end of cmake just makes the
builds faster.

-- 
# Randy MacLeod.  WR Linux
# Wind River an Intel Company