debug: Use separate log group for watcher_t

This component produces a lot of messages that make debugging job
handling difficult.

src/libstrongswan/utils/debug.c

@@ -24,6 +24,7 @@ ENUM(debug_names, DBG_DMN, DBG_ANY,
 	"IKE",
 	"CHD",
 	"JOB",
+	"WCH",
 	"CFG",
 	"KNL",
 	"NET",
@@ -46,6 +47,7 @@ ENUM(debug_lower_names, DBG_DMN, DBG_ANY,
 	"ike",
 	"chd",
 	"job",
+	"wch",
 	"cfg",
 	"knl",
 	"net",

src/libstrongswan/utils/debug.h

@@ -43,6 +43,8 @@ enum debug_t {
 	DBG_CHD,
 	/** job processing */
 	DBG_JOB,
+	/** file descriptor watcher */
+	DBG_WCH,
 	/** configuration backends */
 	DBG_CFG,
 	/** kernel interface */