eudev: add new package

eudev is a fork of systemd-udev which doesn't require all the
rest of systemd. It's suitable for running along with OpenWrt's procd,
eplacing the very outdated version of pre-systemd udev.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

utils/eudev/patches/0003-add_btn_trigger_happy_define.patch

@@ -0,0 +1,15 @@
+Index: eudev-3.1.5/src/udev/udev-builtin-input_id.c
+===================================================================
+--- eudev-3.1.5.orig/src/udev/udev-builtin-input_id.c
++++ eudev-3.1.5/src/udev/udev-builtin-input_id.c
+@@ -33,6 +33,10 @@
+ #include "udev.h"
+ #include "util.h"
+ 
++#ifndef BTN_TRIGGER_HAPPY
++#define BTN_TRIGGER_HAPPY 0x2c0
++#endif
++
+ /* we must use this kernel-compatible implementation */
+ #define BITS_PER_LONG (sizeof(unsigned long) * 8)
+ #define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)

utils/eudev/patches/0004-mtd_probe-uses-stdint_h.patch

@@ -0,0 +1,12 @@
+Index: eudev-3.1.5/src/mtd_probe/mtd_probe.h
+===================================================================
+--- eudev-3.1.5.orig/src/mtd_probe/mtd_probe.h
++++ eudev-3.1.5/src/mtd_probe/mtd_probe.h
+@@ -18,6 +18,7 @@
+  */
+ 
+ #include <mtd/mtd-user.h>
++#include <stdint.h>
+ 
+ #include "macro.h"
+