ell: add package

Add package for Embedded Linux Library (ell) from kernel.org.
Include patch to fix build with GCC 14 by Aditya Nugraha.

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

libs/ell/Makefile

@@ -0,0 +1,49 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=ell
+PKG_VERSION:=0.69
+PKG_RELEASE:=1
+
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_URL:=https://git.kernel.org/pub/scm/libs/ell/ell.git
+PKG_SOURCE_VERSION:=7bed251f8020ef896043f008276f41cd13fdd43f
+PKG_MIRROR_HASH:=b462215391bf6f952b14743b4c54ac3538d4394c785f71c1bcb1623e2cb1cbc9
+
+PKG_MAINTAINER:=Daniel Golle <daniel@makrotopia.org>
+PKG_LICENSE:=GPL-2.0-only
+PKG_LICENSE_FILES:=COPYING
+
+PKG_INSTALL:=1
+
+PKG_FIXUP:=autoreconf
+PKG_BUILD_PARALLEL:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/ell
+	SECTION:=libs
+	CATEGORY:=Libraries
+	TITLE:=Embedded Linux Library
+	URL:=https://patchwork.kernel.org/project/ell/
+endef
+
+define Package/ell/description
+	ELL (Embedded Linux Library) provides core, low-level functionality for system daemons.
+	It integrates with standard libc functionality and replaces some parts of it with more optimal implementations.
+endef
+
+define Build/InstallDev
+	$(INSTALL_DIR) $(1)/usr/include
+	$(CP) $(PKG_INSTALL_DIR)/usr/include/ell $(1)/usr/include/
+	$(INSTALL_DIR) $(1)/usr/lib
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libell.so* $(1)/usr/lib/
+	$(INSTALL_DIR) $(1)/usr/lib/pkgconfig
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/pkgconfig/ell.pc $(1)/usr/lib/pkgconfig/
+endef
+
+define Package/ell/install
+	$(INSTALL_DIR) $(1)/usr/lib
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libell.so* $(1)/usr/lib/
+endef
+
+$(eval $(call BuildPackage,ell))

libs/ell/patches/001-fix-build-with-gcc14.patch

@@ -0,0 +1,10 @@
+--- a/ell/genl.h
++++ b/ell/genl.h
+@@ -11,6 +11,7 @@
+ #include <stdbool.h>
+ #include <stddef.h>
+ #include <stdint.h>
++#include "netlink.h"
+
+ #ifdef __cplusplus
+ extern "C" {