lirc-tools: needs host-python3

As stated in NEWS "Build scripts now requires python3". Fixes:
http://autobuild.buildroot.net/results/f41/f417a17ad24eec8f72402a634588c6b3af8293be/

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

package/lirc-tools/lirc-tools.mk

@@ -9,7 +9,7 @@ LIRC_TOOLS_SOURCE = lirc-$(LIRC_TOOLS_VERSION).tar.bz2
 LIRC_TOOLS_SITE = http://downloads.sourceforge.net/project/lirc/LIRC/$(LIRC_TOOLS_VERSION)
 LIRC_TOOLS_LICENSE = GPLv2+
 LIRC_TOOLS_LICENSE_FILES = COPYING
-LIRC_TOOLS_DEPENDENCIES = host-libxslt host-pkgconf
+LIRC_TOOLS_DEPENDENCIES = host-libxslt host-pkgconf host-python3
 LIRC_TOOLS_INSTALL_STAGING = YES
 
 LIRC_TOOLS_CONF_ENV = XSLTPROC=yes