iwyu: Cleanup include headers

Triggered iwyu and add/remove used headers.

Change-Id: Iadbdb459563b3c89baf2d56f90a540342d020cd5
Signed-off-by: Willy Tu <wltu@google.com>
diff --git a/subprojects/ncsid/src/normalize_ip.c b/subprojects/ncsid/src/normalize_ip.c
index 77783cc..aeada4f 100644
--- a/subprojects/ncsid/src/normalize_ip.c
+++ b/subprojects/ncsid/src/normalize_ip.c
@@ -15,7 +15,9 @@
  */
 
 #include <arpa/inet.h>
+#include <netinet/in.h>
 #include <stdio.h>
+#include <sys/socket.h>
 
 int main(int argc, char* argv[])
 {