Fix typo in error handling for sigwaitinfo() in charon-systemd and charon-tkm

Fixes 858148092d ("Replace usages of sigwait(3) with sigwaitinfo(2)")

src/charon-systemd/charon-systemd.c

@@ -254,7 +254,7 @@ static int run()
 		sig = sigwaitinfo(&set, NULL);
 		if (sig == -1)
 		{
-			DBG1(DBG_DMN, "waiting for signal failed: %s", strerror(error));
+			DBG1(DBG_DMN, "waiting for signal failed: %s", strerror(errno));
 			return SS_RC_INITIALIZATION_FAILED;
 		}
 		switch (sig)

src/charon-tkm/src/charon-tkm.c

@@ -103,7 +103,7 @@ static void run()
 		sig = sigwaitinfo(&set, NULL);
 		if (sig == -1)
 		{
-			DBG1(DBG_DMN, "waiting for signal failed: %s", strerror(error));
+			DBG1(DBG_DMN, "waiting for signal failed: %s", strerror(errno));
 			return;
 		}
 		switch (sig)