package/gdb: fix gdb-10.2 compile for uclibc < v1.0.35 (getrandom related)

- fix getrandom compile for uclibc < v1.0.35, add missing stddef.h
  include (fixed in uclibc since v1.0.35, see [1])

Fixes:

  - http://autobuild.buildroot.net/results/6d4a62c703c85dd993ddb2d90ebe1f6cad24e0b0

  .../host/x86_64-buildroot-linux-uclibc/sysroot/usr/include/sys/random.h:27:35: error: unknown type name ‘size_t’
     27 | extern int getrandom(void *__buf, size_t count, unsigned int flags)
        |                                   ^~~~~~

[1] https://cgit.uclibc-ng.org/cgi/cgit/uclibc-ng.git/commit/?id=00972c02c2b6e0a95d5def4a71bdfb188e091782t

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/gdb/10.2/0006-Fix-getrandom-compile-for-uclibc-v1.0.35.patch

@@ -0,0 +1,39 @@
+From bb894a9cfb1c3cf0e0a174c496ad848f589ee7da Mon Sep 17 00:00:00 2001
+From: Peter Seiderer <ps.report@gmx.net>
+Date: Sat, 6 Nov 2021 10:06:25 +0100
+Subject: [PATCH] Fix getrandom compile for uclibc < v1.0.35
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+- fix getrandom compile for uclibc < v1.0.35, add missing stddef.h
+  include (fixed in uclibc since v1.0.35, see [1])
+
+Fixes:
+
+  .../host/x86_64-buildroot-linux-uclibc/sysroot/usr/include/sys/random.h:27:35: error: unknown type name ‘size_t’
+     27 | extern int getrandom(void *__buf, size_t count, unsigned int flags)
+        |                                   ^~~~~~
+
+[1] https://cgit.uclibc-ng.org/cgi/cgit/uclibc-ng.git/commit/?id=00972c02c2b6e0a95d5def4a71bdfb188e091782t
+
+Signed-off-by: Peter Seiderer <ps.report@gmx.net>
+---
+ gnulib/import/getrandom.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/gnulib/import/getrandom.c b/gnulib/import/getrandom.c
+index 030a78b..7b24350 100644
+--- a/gnulib/import/getrandom.c
++++ b/gnulib/import/getrandom.c
+@@ -19,6 +19,7 @@
+ 
+ #include <config.h>
+ 
++#include <stddef.h>
+ #include <sys/random.h>
+ 
+ #include <errno.h>
+-- 
+2.33.1
+