perl-net-ssh2: avoid build system inspecting host paths

During investigation of adding gcrypt support in perl-net-ssh2, it became
clear that its build system is trying to find libraries via host search
paths, i.e. /usr/lib64/ etc.

This can be avoided by explicitly passing a 'lib' and 'inc' path.

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

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

@@ -10,5 +10,9 @@ PERL_NET_SSH2_SITE = $(BR2_CPAN_MIRROR)/authors/id/S/SA/SALVA
 PERL_NET_SSH2_LICENSE = Artistic or GPL-1.0+
 PERL_NET_SSH2_LICENSE_FILES = README
 PERL_NET_SSH2_DEPENDENCIES = libssh2 zlib
+# build system will use host search paths by default
+PERL_NET_SSH2_CONF_OPTS += \
+	lib="$(STAGING_DIR)/usr/lib" \
+	inc="$(STAGING_DIR)/usr/include"
 
 $(eval $(perl-package))