package/xml-security-c: requires DES support in openssl

Enable DES in openssl to fix build failure raised since the addition of
the package in bbda38afbbfa79ff436e1a187bb267b8d9558036

Fixes:
 - http://autobuild.buildroot.org/results/fb9252de77e020182fea7e9011a3e402c49d926b

Tested-by: Matthew Weber <matthew.weber@collins.com>
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/xml-security-c/Config.in

@@ -3,6 +3,7 @@ config BR2_PACKAGE_XML_SECURITY_C
 	depends on BR2_INSTALL_LIBSTDCPP # xerces
 	depends on BR2_USE_WCHAR # xerces
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_7 # C++11
+	select BR2_PACKAGE_LIBOPENSSL_ENABLE_DES if BR2_PACKAGE_LIBOPENSSL
 	select BR2_PACKAGE_OPENSSL
 	select BR2_PACKAGE_XERCES
 	help