Replace many includes of libavutil/common.h with what is actually needed

This reduces the number of false dependencies on header files and
speeds up compilation.

Originally committed as revision 22407 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavutil/mathematics.h

@@ -23,7 +23,7 @@
 
 #include <stdint.h>
 #include <math.h>
-#include "common.h"
+#include "attributes.h"
 #include "rational.h"
 
 #ifndef M_E