package/vtun: requires blowfish support in openssl

Enable blowfish in openssl to fix build failure raised since commit
a83d41867c8d69a77d5cd0a665aa216af5340359

Fixes:
 - http://autobuild.buildroot.org/results/38f6b92ead5861c2e15ca768acea9742ad4e0fec

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/vtun/Config.in

@@ -3,6 +3,7 @@ config BR2_PACKAGE_VTUN
 	depends on BR2_USE_MMU # fork()
 	select BR2_PACKAGE_LZO
 	select BR2_PACKAGE_OPENSSL
+	select BR2_PACKAGE_LIBOPENSSL_ENABLE_BLOWFISH if BR2_PACKAGE_LIBOPENSSL
 	select BR2_PACKAGE_ZLIB
 	help
 	  Tool for easily creating Virtual Tunnels over TCP/IP networks