logging: use a different color tone for DLOOP

Normal blue (34) is really hard to read on terminals with dark
background.  Let's use light blue (94) instead.

Change-Id: Iadc9b8fb74ec17455435893a532c2f12e02cb804

src/common/logging.c

@@ -116,7 +116,7 @@ static struct log_info_cat bts_log_info_cat[] = {
 	[DLOOP] = {
 		.name = "DLOOP",
 		.description = "Control loops",
-		.color = "\033[0;34m",
+		.color = "\033[0;94m",
 		.enabled = 1, .loglevel = LOGL_NOTICE,
 	},
 };