libnetfilter_conntrack: fix static linking

It has a hardcoded -ldl link invocation, so drop it. Fixes:
http://autobuild.buildroot.net/results/66ba5f76694d0738b113463579ce6b2fa49a89d6/

Also add hash file and rename uclinux patch to new naming convention.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libnetfilter_conntrack/0002-src-Makefile.am-drop-hardcoded-ldl.patch

@@ -0,0 +1,27 @@
+From b8d32eff8dbfff5a93b6ea6ee9f5747e16cb32c4 Mon Sep 17 00:00:00 2001
+From: Gustavo Zacarias <gustavo@zacarias.com.ar>
+Date: Wed, 14 Jan 2015 10:53:20 -0300
+Subject: [PATCH] src/Makefile.am: drop hardcoded -ldl
+
+This breaks static builds where the toolchain completely lacks libdl.
+
+Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
+---
+ src/Makefile.am | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/Makefile.am b/src/Makefile.am
+index 7d6c905..374598a 100644
+--- a/src/Makefile.am
++++ b/src/Makefile.am
+@@ -11,6 +11,6 @@ lib_LTLIBRARIES = libnetfilter_conntrack.la
+ libnetfilter_conntrack_la_LIBADD = conntrack/libnfconntrack.la \
+ 				   expect/libnfexpect.la \
+ 				   ${LIBNFNETLINK_LIBS} ${LIBMNL_LIBS}
+-libnetfilter_conntrack_la_LDFLAGS = -Wc,-nostartfiles -lnfnetlink -ldl 	\
++libnetfilter_conntrack_la_LDFLAGS = -Wc,-nostartfiles -lnfnetlink \
+ 				    -version-info $(LIBVERSION)
+ libnetfilter_conntrack_la_SOURCES = main.c callback.c
+-- 
+2.0.5
+

package/libnetfilter_conntrack/libnetfilter_conntrack.hash

@@ -0,0 +1,3 @@
+# From ftp://ftp.netfilter.org/pub/libnetfilter_conntrack/libnetfilter_conntrack-1.0.4.tar.bz2.{md5sum,sha1sum}
+md5	18cf80c4b339a3285e78822dbd4f08d7 	libnetfilter_conntrack-1.0.4.tar.bz2
+sha1	34fae1a30cbd51d46945e9f35790118c3462b0c6	libnetfilter_conntrack-1.0.4.tar.bz2

package/libnetfilter_conntrack/libnetfilter_conntrack.mk

@@ -9,6 +9,7 @@ LIBNETFILTER_CONNTRACK_SOURCE = libnetfilter_conntrack-$(LIBNETFILTER_CONNTRACK_
 LIBNETFILTER_CONNTRACK_SITE = http://www.netfilter.org/projects/libnetfilter_conntrack/files
 LIBNETFILTER_CONNTRACK_INSTALL_STAGING = YES
 LIBNETFILTER_CONNTRACK_DEPENDENCIES = host-pkgconf libnfnetlink libmnl
+# For 0001-uclinux.patch & 0002-src-Makefile.am-drop-hardcoded-ldl.patch
 LIBNETFILTER_CONNTRACK_AUTORECONF = YES
 LIBNETFILTER_CONNTRACK_LICENSE = GPLv2+
 LIBNETFILTER_CONNTRACK_LICENSE_FILES = COPYING