[ntoskrnl]
handle the case where the cpu does not support returning the brand name
CORE-7952
 

git-svn-id: svn://svn.reactos.org/reactos/trunk/reactos@63798 97493ccd-5924-5043-b1f5-66cb403b36ce
[CMAKE]
 - Use cache to decide whether we use precompiled headers or not.

git-svn-id: svn://svn.reactos.org/reactos/trunk/reactos@63799 97493ccd-5924-5043-b1f5-66cb403b36ce