libmicrohttpd: disable curl testcases

They require a toolchain with IPv6. Fixes:
http://autobuild.buildroot.net/results/edb/edb1b5ee1ffaa6a495b4d7c2976f618c8331b5d2/

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libmicrohttpd/libmicrohttpd.mk

@@ -8,7 +8,7 @@ LIBMICROHTTPD_VERSION = 0.9.34
 LIBMICROHTTPD_SITE = $(BR2_GNU_MIRROR)/libmicrohttpd
 LIBMICROHTTPD_LICENSE_FILES = COPYING
 LIBMICROHTTPD_INSTALL_STAGING = YES
-LIBMICROHTTPD_CONF_OPT = --disable-spdy
+LIBMICROHTTPD_CONF_OPT = --disable-curl --disable-spdy
 
 ifeq ($(BR2_PACKAGE_LIBMICROHTTPD_SSL),y)
 LIBMICROHTTPD_LICENSE = LGPLv2.1+