openswan: disable documentation

Disable pod2man and xmlto which are used to build man pages

Fixes:
 - http://autobuild.buildroot.org/results/2268814b8f5a071ecec1aab962b50a1edcb818d7

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/openswan/openswan.mk

@@ -10,7 +10,7 @@ OPENSWAN_LICENSE = GPL-2.0+, BSD-3-Clause
 OPENSWAN_LICENSE_FILES = COPYING LICENSE
 
 OPENSWAN_DEPENDENCIES = host-bison host-flex gmp iproute2
-OPENSWAN_MAKE_OPTS = ARCH=$(BR2_ARCH) CC="$(TARGET_CC)" \
+OPENSWAN_MAKE_OPTS = ARCH=$(BR2_ARCH) CC="$(TARGET_CC)" POD2MAN="" XMLTO="" \
 	USERCOMPILE="$(TARGET_CFLAGS) $(if $(BR2_TOOLCHAIN_SUPPORTS_PIE),-fPIE)" \
 	USERLINK="$(TARGET_LDFLAGS) $(if $(BR2_TOOLCHAIN_SUPPORTS_PIE),-fPIE)" \
 	INC_USRLOCAL=/usr USE_KLIPS=false USE_MAST=false USE_NM=false