package/libedit: fix compile error with uClibc

In Buildroot commit cc69dbf8fdef6619c4ea09a4aaa97cd5ad3ee423
("package/libedit: bump version to 20221030-3.1"), the version of
libedit was bumped from 20210910-3.1 to 20221030-3.1. This broke the
build with uClibc:

./sys.h:96:1: error: unknown type name 'ssize_t'; did you mean 'size_t'?

Header file uses ssize_t so sys/types.h must be included.

This commit adds a patch that fixes this issue.

Fixes:

  http://autobuild.buildroot.net/results/439538b23776a58ff81c38754a19ee92c3590a1f

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libedit/0002-add-sys-types_h.patch

@@ -0,0 +1,15 @@
+Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
+Upstream: N/A only reachable via mail
+
+diff -Nur libedit-20221030-3.1.orig/src/sys.h libedit-20221030-3.1/src/sys.h
+--- libedit-20221030-3.1.orig/src/sys.h	2022-10-30 06:35:40.000000000 +0100
++++ libedit-20221030-3.1/src/sys.h	2023-08-12 09:52:28.137223311 +0200
+@@ -40,7 +40,7 @@
+ #ifndef _h_sys
+ #define	_h_sys
+ 
+-#if defined(HAVE_SYS_TYPES_H) && defined(__sun)
++#if defined(HAVE_SYS_TYPES_H)
+ #include <sys/types.h>
+ #endif
+