Upgrade tcpdump to tcpdump-4.99.1

Test: make
Change-Id: I052ed8f5279c806e4d2ff925f581b71db3ac03c0
diff --git a/missing/strlcpy.c b/missing/strlcpy.c
index 24dcca6..2dc51b9 100644
--- a/missing/strlcpy.c
+++ b/missing/strlcpy.c
@@ -46,9 +46,9 @@
 size_t
 strlcpy(char *dst, const char *src, size_t siz)
 {
-	register char *d = dst;
-	register const char *s = src;
-	register size_t n = siz;
+	char *d = dst;
+	const char *s = src;
+	size_t n = siz;
 
 	/* Copy as many bytes as will fit */
 	if (n != 0 && --n != 0) {