libev: Import from management, with path fixes

Imports the latest version from the management feed, and fixes the
install paths.  All example code, and desktop linux expects and installs
libev's headers to /usr/include/<ev.h> not under a subdirectory.

Signed-off-by: Karl Palsson <karlp@tweak.net.au>

libs/libev/Makefile

+#
+# Copyright (C) 2014-2015 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=libev
+PKG_VERSION:=4.19
+PKG_RELEASE:=1
+
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_SOURCE_URL:=http://dist.schmorp.de/libev/Attic/
+PKG_MD5SUM:=01d1c672697f649b4f94abd0b70584ff
+PKG_LICENSE:=BSD-2-Clause
+PKG_MAINTAINER:=Karl Palsson <karlp@tweak.net.au>
+
+PKG_BUILD_PARALLEL:=1
+PKG_FIXUP:=autoreconf
+PKG_INSTALL:=1
+PKG_USE_MIPS16:=0
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/libev
+  SECTION:=libs
+  CATEGORY:=Libraries
+  TITLE:=High-performance event loop
+  URL:=http://software.schmorp.de/pkg/libev.html
+endef
+
+define Package/libev/description
+ A full-featured and high-performance event loop that is loosely modelled after
+ libevent, but without its limitations and bugs.
+endef
+
+TARGET_CFLAGS += $(FPIC)
+
+CONFIGURE_ARGS += \
+	--enable-shared \
+	--enable-static \
+
+define Build/InstallDev
+	$(INSTALL_DIR) $(1)/usr/include
+	$(CP) $(PKG_INSTALL_DIR)/usr/include/* $(1)/usr/include/
+	$(INSTALL_DIR) $(1)/usr/lib
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libev.{a,so*} $(1)/usr/lib/
+endef
+
+define Package/libev/install
+	$(INSTALL_DIR) $(1)/usr/lib
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libev.so* $(1)/usr/lib/
+endef
+
+$(eval $(call BuildPackage,libev))