perl-net-ssh2: add missing dependency on zlib

perl-net-ssh2 requires zlib. When using the openssl backend to libssh2, this
dependency is implicit via openssl, but when using the libgcrypt backend the
dependency is missing.

Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/perl-net-ssh2/Config.in

@@ -2,6 +2,7 @@ config BR2_PACKAGE_PERL_NET_SSH2
 	bool "perl-net-ssh2"
 	depends on !BR2_STATIC_LIBS
 	select BR2_PACKAGE_LIBSSH2
+	select BR2_PACKAGE_ZLIB
 	help
 	  Support for the SSH 2 protocol via libssh2.
 

package/perl-net-ssh2/perl-net-ssh2.mk

@@ -9,6 +9,6 @@ PERL_NET_SSH2_SOURCE = Net-SSH2-$(PERL_NET_SSH2_VERSION).tar.gz
 PERL_NET_SSH2_SITE = $(BR2_CPAN_MIRROR)/authors/id/S/SA/SALVA
 PERL_NET_SSH2_LICENSE = Artistic or GPL-1.0+
 PERL_NET_SSH2_LICENSE_FILES = README
-PERL_NET_SSH2_DEPENDENCIES = libssh2
+PERL_NET_SSH2_DEPENDENCIES = libssh2 zlib
 
 $(eval $(perl-package))