syslog needs a valid socket path for _PATH_LOG

/dev/kmsg is a character device already used for different purposes.
Most distribution use /dev/log for _PATH_LOG but this path is already used
by logcat.
I suggest using /dev/syslog.
This change was tested with busybox's syslogd.

Change-Id: I75b428123c7a0b3ca4bea656ce06860f6f727dde
diff --git a/libc/include/syslog.h b/libc/include/syslog.h
index d35bc79..cb8c48c 100644
--- a/libc/include/syslog.h
+++ b/libc/include/syslog.h
@@ -98,7 +98,7 @@
 
 #define SYSLOG_DATA_INIT {-1, 0, 0, 0, (const char *)0, LOG_USER, 0xff}
 
-#define _PATH_LOG  "/dev/kmsg"
+#define _PATH_LOG  "/dev/syslog"
 
 extern void	closelog(void);
 extern void	openlog(const char *, int, int);