attr: disable gettext for host variant

Otherwise it leads to build failure and we don't need it. Fixes:
http://autobuild.buildroot.net/results/59e/59e7e1db122523b292d34405df6dca9faa616da2/

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

package/attr/attr.mk

@@ -9,6 +9,7 @@ ATTR_SOURCE = attr-$(ATTR_VERSION).src.tar.gz
 ATTR_SITE = http://download.savannah.gnu.org/releases/attr
 ATTR_INSTALL_STAGING = YES
 ATTR_CONF_OPTS = --enable-gettext=no
+HOST_ATTR_CONF_OPTS = --enable-gettext=no
 ATTR_LICENSE = GPLv2+ (programs), LGPLv2.1+ (libraries)
 ATTR_LICENSE_FILES = doc/COPYING doc/COPYING.LGPL