libev: update to 4.24

Compile & runtime tested: ar71xx, ramips, mvebu

Signed-off-by: Deng Qingfang <dengqf6@mail2.sysu.edu.cn>

libs/libev/Makefile

@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libev
-PKG_VERSION:=4.22
+PKG_VERSION:=4.24
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://dist.schmorp.de/libev/Attic/
-PKG_HASH:=736079e8ac543c74d59af73f9c52737b3bfec9601f020bf25a87a4f4d0f01bd6
+PKG_HASH:=973593d3479abdf657674a55afe5f78624b0e440614e2b8cb3a07f16d4d7f821
 PKG_LICENSE:=BSD-2-Clause
 PKG_MAINTAINER:=Karl Palsson <karlp@tweak.net.au>