netcat-openbsd: Fix linking and use GNU_HASH for symbols

Inherit the pkgconfig bbclass so libbsd can be found properly and
pass in LDFLAGS to make sure the right link line is being used.

recipes-support/netcat-openbsd/netcat-openbsd_1.105.bb

@@ -6,6 +6,8 @@ LIC_FILES_CHKSUM = "file://../debian/copyright;md5=ee6bbaacb5db5f2973818f0902c3a
 
 DEPENDS += "glib-2.0 libbsd"
 
+inherit pkgconfig
+
 SRC_URI = "${DEBIAN_MIRROR}/main/n/netcat-openbsd/netcat-openbsd_${PV}.orig.tar.gz;name=netcat \
            ${DEBIAN_MIRROR}/main/n/netcat-openbsd/netcat-openbsd_${PV}-7.debian.tar.gz;name=netcat-patch"
 
@@ -31,7 +33,7 @@ python do_patch() {
 do_compile() {
     cd ${S}
     pkgrel=4
-    oe_runmake CFLAGS="$CFLAGS -DDEBIAN_VERSION=\"\\\"${pkgrel}\\\"\""
+    oe_runmake LDFLAGS="$LDFLAGS" CFLAGS="$CFLAGS -DDEBIAN_VERSION=\"\\\"${pkgrel}\\\"\""
 }
 
 do_install() {