dissolve libcommon: drop debug.c

Apply more concise logging categories in each main scope. The bulk goes to
msc_main.c, obviously, while tests and utils get a slimmed down bunch of
logging categories.

Change-Id: I969a0662ba273f3721b6820d02151b7a5b8014b8
diff --git a/src/libmsc/smpp_utils.c b/src/libmsc/smpp_utils.c
index 7208e25..7fffdd2 100644
--- a/src/libmsc/smpp_utils.c
+++ b/src/libmsc/smpp_utils.c
@@ -19,8 +19,7 @@
 
 
 #include "smpp_smsc.h"
-#include <osmocom/msc/debug.h>
-
+#include <osmocom/core/logging.h>
 
 int smpp_determine_scheme(uint8_t dcs, uint8_t *data_coding, int *mode)
 {