package/libtool: disable makeinfo

host-libtool can fail to build if the host is missing makeinfo, so
disable it.

Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libtool/libtool.mk

@@ -13,6 +13,7 @@ LIBTOOL_DEPENDENCIES = host-m4
 LIBTOOL_LICENSE = GPLv2+
 LIBTOOL_LICENSE_FILES = COPYING
 
+HOST_LIBTOOL_CONF_ENV = MAKEINFO=true
 HOST_LIBTOOL_LIBTOOL_PATCH = NO
 
 # We have a patch that affects libtool.m4, which triggers an autoreconf