acpid: add patch to fix build failure with external uClibc toolchains

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/acpid/acpid-02-add-missing-defines.patch

@@ -0,0 +1,40 @@
+Add missing MSG_CMSG_CLOEXEC
+
+Unpatched uClibc toolchains, even using the latest 0.9.33.2, do not
+have the MSG_CMSG_CLOEXEC definition. Even though the Buildroot
+internal toolchain backend has a uClibc patch to provide it, it
+doesn't apply to external toolchains. This patch provides the
+definition of MSG_CMSG_CLOEXEC.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+
+Index: b/libnetlink.h
+===================================================================
+--- a/libnetlink.h
++++ b/libnetlink.h
+@@ -7,6 +7,10 @@
+ #include <linux/netlink.h>
+ #include <linux/rtnetlink.h>
+ 
++#ifndef MSG_CMSG_CLOEXEC
++#define MSG_CMSG_CLOEXEC 0x40000000
++#endif
++
+ struct rtnl_handle
+ {
+ 	int			fd;
+Index: b/kacpimon/libnetlink.h
+===================================================================
+--- a/kacpimon/libnetlink.h
++++ b/kacpimon/libnetlink.h
+@@ -7,6 +7,10 @@
+ #include <linux/netlink.h>
+ #include <linux/rtnetlink.h>
+ 
++#ifndef MSG_CMSG_CLOEXEC
++#define MSG_CMSG_CLOEXEC 0x40000000
++#endif
++
+ struct rtnl_handle
+ {
+ 	int			fd;