systemd: Fix reallocarray check

Musl brought this latent issue to fore

(From OE-Core rev: 6012fffa99b600956ea1076d60e050d0737b4c4f)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/systemd/systemd/0001-meson-Fix-reallocarray-check.patch

@@ -0,0 +1,30 @@
+From 1ebf1a1df17afd8b89f84b1928a89069035bf20b Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Sat, 12 Dec 2020 16:15:57 -0800
+Subject: [PATCH] meson: Fix reallocarray check
+
+reallocarray() is defined in stdlib.h, so that would be right header to
+check for its presense.
+
+Upstream-Status: Submitted [https://github.com/systemd/systemd/pull/17951]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ meson.build | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/meson.build b/meson.build
+index d205f846c7..e0a3c53529 100644
+--- a/meson.build
++++ b/meson.build
+@@ -517,7 +517,7 @@ foreach ident : [
+                                  #include <sys/stat.h>
+                                  #include <unistd.h>'''],
+         ['explicit_bzero' ,   '''#include <string.h>'''],
+-        ['reallocarray',      '''#include <malloc.h>'''],
++        ['reallocarray',      '''#include <stdlib.h>'''],
+         ['set_mempolicy',     '''#include <stdlib.h>
+                                  #include <unistd.h>'''],
+         ['get_mempolicy',     '''#include <stdlib.h>
+-- 
+2.29.2
+

meta/recipes-core/systemd/systemd_246.6.bb

@@ -24,6 +24,7 @@ SRC_URI += "file://touchscreen.rules \
            file://0001-systemd.pc.in-use-ROOTPREFIX-without-suffixed-slash.patch \
            file://selinux-hook-handling-to-enumerate-nexthop.patch \
            file://0001-logind-Restore-chvt-as-non-root-user-without-polkit.patch \
+           file://0001-meson-Fix-reallocarray-check.patch \
            "
 
 # patches needed by musl