bump libevent to 2.1.11 in depends

this doesn't need patches on Android anymore like 2.1.8 did.

depends/packages/libevent.mk

@@ -1,19 +1,12 @@
 package=libevent
-$(package)_version=2.1.8-stable
+$(package)_version=2.1.11-stable
 $(package)_download_path=https://github.com/libevent/libevent/archive/
 $(package)_file_name=release-$($(package)_version).tar.gz
-$(package)_sha256_hash=316ddb401745ac5d222d7c529ef1eada12f58f6376a66c1118eee803cb70f83d
-$(package)_patches=fix_android_arc4random_addrandom.patch
+$(package)_sha256_hash=229393ab2bf0dc94694f21836846b424f3532585bac3468738b7bf752c03901e
 
-ifneq (,$(findstring android,$(host)))
-  define $(package)_preprocess_cmds
-    ./autogen.sh && patch -p1 < $($(package)_patch_dir)/fix_android_arc4random_addrandom.patch
-  endef
-else
-  define $(package)_preprocess_cmds
+define $(package)_preprocess_cmds
   ./autogen.sh
-  endef
-endif
+endef
 
 define $(package)_set_vars
   $(package)_config_opts=--disable-shared --disable-openssl --disable-libevent-regress --disable-samples

depends/patches/libevent/fix_android_arc4random_addrandom.patch

@@ -1,68 +0,0 @@
-From cadae3ab7abf45e61ecae8aac39d97d1f3cbd336 Mon Sep 17 00:00:00 2001
-From: Lawrence Nahum <lawrence@greenaddress.it>
-Date: Sun, 3 Dec 2017 22:56:09 +0100
-Subject: [PATCH] fixup
-
----
- configure.ac          | 1 +
- evutil_rand.c         | 3 +++
- include/event2/util.h | 4 ++--
- 3 files changed, 6 insertions(+), 2 deletions(-)
-
-diff --git a/configure.ac b/configure.ac
-index 7528d37..3bb2121 100644
---- a/configure.ac
-+++ b/configure.ac
-@@ -341,6 +341,7 @@ dnl Checks for library functions.
- AC_CHECK_FUNCS([ \
-   accept4 \
-   arc4random \
-+  arc4random_addrandom \
-   arc4random_buf \
-   eventfd \
-   epoll_create1 \
-diff --git a/evutil_rand.c b/evutil_rand.c
-index 046a14b..3f0bf2c 100644
---- a/evutil_rand.c
-+++ b/evutil_rand.c
-@@ -191,6 +191,7 @@ evutil_secure_rng_get_bytes(void *buf, size_t n)
- {
- 	ev_arc4random_buf(buf, n);
- }
-+#ifdef HAVE_ARC4RANDOM_ADDRANDOM
- 
- void
- evutil_secure_rng_add_bytes(const char *buf, size_t n)
-@@ -199,6 +200,8 @@ evutil_secure_rng_add_bytes(const char *buf, size_t n)
- 	    n>(size_t)INT_MAX ? INT_MAX : (int)n);
- }
- 
-+#endif
-+
- void
- evutil_free_secure_rng_globals_(void)
- {
-diff --git a/include/event2/util.h b/include/event2/util.h
-index dd4bbb6..a9a169d 100644
---- a/include/event2/util.h
-+++ b/include/event2/util.h
-@@ -841,7 +841,7 @@ int evutil_secure_rng_init(void);
-  */
- EVENT2_EXPORT_SYMBOL
- int evutil_secure_rng_set_urandom_device_file(char *fname);
--
-+#ifdef HAVE_ARC4RANDOM_ADDRANDOM
- /** Seed the random number generator with extra random bytes.
- 
-     You should almost never need to call this function; it should be
-@@ -858,7 +858,7 @@ int evutil_secure_rng_set_urandom_device_file(char *fname);
-  */
- EVENT2_EXPORT_SYMBOL
- void evutil_secure_rng_add_bytes(const char *dat, size_t datlen);
--
-+#endif
- #ifdef __cplusplus
- }
- #endif
--- 
-2.14.3

doc/dependencies.md

@@ -13,7 +13,7 @@ These are the dependencies currently used by Bitcoin Core. You can find instruct
 | FreeType | [2.7.1](https://download.savannah.gnu.org/releases/freetype) |  | No |  |  |
 | GCC |  | [4.8+](https://gcc.gnu.org/) (C++11 support) |  |  |  |
 | HarfBuzz-NG |  |  |  |  |  |
-| libevent | [2.1.8-stable](https://github.com/libevent/libevent/releases) | 2.0.22 | No |  |  |
+| libevent | [2.1.11-stable](https://github.com/libevent/libevent/releases) | 2.0.22 | No |  |  |
 | libpng |  |  |  |  | [Yes](https://github.com/bitcoin/bitcoin/blob/master/depends/packages/qt.mk) |
 | librsvg | |  |  |  |  |
 | MiniUPnPc | [2.0.20180203](http://miniupnp.free.fr/files) |  | No |  |  |