Patch libevent for modern glibc arc4random

depends/packages/libevent.mk

@@ -3,9 +3,10 @@ $(package)_version=2.1.8-stable
 $(package)_download_path=https://github.com/libevent/libevent/archive/
 $(package)_file_name=release-$($(package)_version).tar.gz
 $(package)_sha256_hash=316ddb401745ac5d222d7c529ef1eada12f58f6376a66c1118eee803cb70f83d
+$(package)_patches=glibc-arc4random-addrandom.patch
 
 define $(package)_preprocess_cmds
-  ./autogen.sh
+  patch -p1 < $($(package)_patch_dir)/glibc-arc4random-addrandom.patch && ./autogen.sh
 endef
 
 define $(package)_set_vars

depends/patches/libevent/glibc-arc4random-addrandom.patch

@@ -0,0 +1,18 @@
+diff --git a/evutil_rand.c b/evutil_rand.c
+index 9bdae14..6d2b1a1 100644
+--- a/evutil_rand.c
++++ b/evutil_rand.c
+@@ -193,8 +193,13 @@ evutil_secure_rng_get_bytes(void *buf, size_t n)
+ void
+ evutil_secure_rng_add_bytes(const char *buf, size_t n)
+ {
++#ifdef EVENT__HAVE_ARC4RANDOM
++	(void)buf;
++	(void)n;
++#else
+ 	arc4random_addrandom((unsigned char*)buf,
+ 	    n>(size_t)INT_MAX ? INT_MAX : (int)n);
++#endif
+ }
+ 
+ void