package/libssh: openssl backend requires DES

Make sure that openssl supports DES. The libssh openssl backend depends
on DES support.

Fixes:
http://autobuild.buildroot.net/results/faf773b9997d6504f32fe660d0d9b9c15a198aa5/
http://autobuild.buildroot.net/results/c3ebcbb9b5ff502e7acefb8b2426bd544913d415/

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/libssh/Config.in

@@ -4,6 +4,7 @@ config BR2_PACKAGE_LIBSSH
 	depends on !BR2_STATIC_LIBS
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	select BR2_PACKAGE_OPENSSL if !(BR2_PACKAGE_MBEDTLS || BR2_PACKAGE_LIBGCRYPT)
+	select BR2_PACKAGE_LIBOPENSSL_ENABLE_DES if BR2_PACKAGE_LIBOPENSSL
 	help
 	  libssh is a multiplatform C library implementing the SSHv2
 	  and SSHv1 protocol on client and server side. With libssh,