Rename T files to avoid name clashes

There is already common/utils/config.h. This file(name) is hardcoded as
it is included into asn1c, and cannot be renamed. To avoid a name clash
and confusing, we rename T's config.h/c to configuration.h/c.

common/utils/T/tracer/textlog.c

@@ -11,7 +11,7 @@
 #include "gui/gui.h"
 #include "utils.h"
 #include "event_selector.h"
-#include "config.h"
+#include "configuration.h"
 
 typedef struct {
   int socket;