Link CBuildConfig and CVersion into static library blackconfig

CBuildConfig including private keys etc. should not be part of a
public library API. Therefore link it into a static library, which
is not available to end users.

refs #645

src/blackmisc/audio/audioutils.cpp

@@ -7,12 +7,14 @@
  * contained in the LICENSE file.
  */
 
-#include "audioutils.h"
-#include "blackmisc/buildconfig.h"
+#include "blackconfig/buildconfig.h"
+#include "blackmisc/audio/audioutils.h"
 
 #include <QProcess>
 #include <QStringList>
 
+using namespace BlackConfig;
+
 namespace BlackMisc
 {
     namespace Audio