lxc: disable lua and python

Also conditionally disable bash if bash isn't built. Fixes:
http://autobuild.buildroot.net/results/8ea/8ea1d682706ba5fee27a64008bb7237d53120e9b/

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/lxc/lxc.mk

@@ -11,6 +11,8 @@ LXC_LICENSE_FILES = COPYING
 LXC_DEPENDENCIES = libcap host-pkgconf
 # configure not shipped
 LXC_AUTORECONF = YES
-LXC_CONF_OPT = --disable-apparmor --with-distro=buildroot
+LXC_CONF_OPT = --disable-apparmor --with-distro=buildroot \
+	--disable-lua --disable-python \
+	$(if $(BR2_PACKAGE_BASH),,--disable-bash)
 
 $(eval $(autotools-package))