Fixed include in tests

(cherry picked from commit aeadc752)

sflphone-common/test/sdptest.cpp

@@ -28,10 +28,11 @@
  *  as that of the covered work.
  */
 
+#include "sdptest.h"
 #include <iostream>
-#include <string.h>
+#include <cstring>
 
-#include "sdptest.h"
+#include "audio/codecs/audiocodec.h"
 
 
 enum session_type

sflphone-common/test/sdptest.h

@@ -44,7 +44,7 @@
 #include <cppunit/TestCase.h>
 #include <cppunit/TestSuite.h>
 
-#include <assert.h>
+#include <cassert>
 
 #include <exception>
 #include <string>