netkit-rwho: Include stdint.h for int32_t

This ensures that when libc does not include stdint.h indirectly then it
still can compile

Fixes
| ../include/protocols/rwhod.h:57:2: error: unknown type name 'int32_t'; did you mean 'uint32_t'?

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-networking/recipes-netkit/netkit-rwho/netkit-rwho/0002-Fix-build-issues-found-with-musl.patch

@@ -12,8 +12,6 @@ Upstream-Status: Pending
  rwhod/rwhod.c     | 5 +++--
  3 files changed, 5 insertions(+), 2 deletions(-)
 
-diff --git a/ruptime/ruptime.c b/ruptime/ruptime.c
-index 1d4f7b6..f1f043c 100644
 --- a/ruptime/ruptime.c
 +++ b/ruptime/ruptime.c
 @@ -53,6 +53,7 @@ char ruptime_rcsid[] =
@@ -24,11 +22,9 @@ index 1d4f7b6..f1f043c 100644
  
  struct hs {
  	char	hs_hostname[MAXHOSTNAMELEN];
-diff --git a/rwho/rwho.c b/rwho/rwho.c
-index 63919ac..71aec9e 100644
 --- a/rwho/rwho.c
 +++ b/rwho/rwho.c
-@@ -49,6 +49,7 @@ char rcsid[] = "$Id: rwho.c,v 1.7 1999/08/01 20:44:18 dholland Exp $";
+@@ -49,6 +49,7 @@ char rcsid[] = "$Id: rwho.c,v 1.7 1999/0
  #include <assert.h>
  #include <stdio.h>
  #include <time.h>
@@ -36,8 +32,6 @@ index 63919ac..71aec9e 100644
  #include <protocols/rwhod.h>
  
  #include "../version.h"
-diff --git a/rwhod/rwhod.c b/rwhod/rwhod.c
-index 54498d0..40cabcf 100644
 --- a/rwhod/rwhod.c
 +++ b/rwhod/rwhod.c
 @@ -76,6 +76,7 @@ char rcsid[] =
@@ -66,6 +60,13 @@ index 54498d0..40cabcf 100644
  /*
   * Taken from:
   *
--- 
-2.14.1
-
+--- a/include/protocols/rwhod.h
++++ b/include/protocols/rwhod.h
+@@ -37,6 +37,7 @@
+ #ifndef _RWHOD_H_
+ #define	_RWHOD_H_
+ 
++#include <stdint.h>
+ /*
+  * rwho protocol packet format.
+  */