qemu.inc: Non deterministic compile of qemu

qemu.inc: Non deterministic compile of qemu

When you using a qemuppc target and sstate you might end up with
the problem:

qemu-system-ppc: error while loading shared libraries:
   libfdt.so.1: cannot open shared object file: No such file or directory

The way you can force this to happen assuming you are using sstate is
as follows:

bitbake dtc-native
bitbake -c cleansstate qemu-native
bitbake qemu-native
bitbake -c clean dtc-native

Now go start qemu and it will fail.  The solution is to always build
the dtc libraries since they are used and needed by the qemuppc
simulator.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>