Revert "package/libvirtd: fix recursive dependency in Kconfig"

This reverts commit f81242ae4fb64ab85af5d38e70246222276552ae to avoid
the following build failure:

Makefile:575: *** libbsd is in the dependency chain of netcat-openbsd that has added it to its _DEPENDENCIES variable without selecting it or depending on it from Config.in.  Stop.

Fixes:
 - http://autobuild.buildroot.org/results/aada1d92df6cab0d01e27431b7b7483e3d165e79

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit ecf49374ee622c7b8ff0ac8d5cb223a9b65141b3)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libvirt/Config.in

@@ -44,13 +44,15 @@ if BR2_PACKAGE_LIBVIRT
 config BR2_PACKAGE_LIBVIRT_DAEMON
 	bool "libvirtd"
 	default y
+	depends on BR2_INSTALL_LIBSTDCPP || BR2_PACKAGE_NETCAT_OPENBSD # nmap
 	select BR2_PACKAGE_BUSYBOX_SHOW_OTHERS
 	select BR2_PACKAGE_DNSMASQ
 	select BR2_PACKAGE_EBTABLES
 	select BR2_PACKAGE_IPTABLES
 	select BR2_PACKAGE_IPROUTE2
 	# These are required because there is no way to unequivocally select a modern netcat
-	select BR2_PACKAGE_NETCAT_OPENBSD if !BR2_PACKAGE_NMAP_NCAT
+	select BR2_PACKAGE_NMAP      if !BR2_PACKAGE_NETCAT_OPENBSD
+	select BR2_PACKAGE_NMAP_NCAT if !BR2_PACKAGE_NETCAT_OPENBSD
 	select BR2_PACKAGE_RADVD
 	help
 	  Build the libvirt daemon (libvirtd) otherwise build only the