MMX/SSE{2}/3DNOW checks in kdefx/configure.in.in are wrong

[Maks Orlovich]

> As you can see anyone can compile a program with SSE2 instruction but it
> will not run unless
> your CPU supports it. But kdelibs configure says I got MMX/3DNOW/SSE/SSE2
> support on a Pentium3!
> ( Which would be cool ;) ). A better solution would be doing :

<snip>
No, the tests are correct. They check for whether your system is capable of 
compiling the proper versions. There is a run-time check, too. See KCPUInfo.