[aml] Fix compilation when using autopoint

The host version of autopoint was being used because AUTOPOINT is
not defined, leading to build failures such as this (with util-linux
2.20.1):

autopoint: *** Missing version: please specify in configure.ac through a line 'AM_GNU_GETTEXT_VERSION(x.yy.zz)' the gettext version the package is using
autopoint: *** Stop.
[aml] Use target version of libusb-config in lirc

Fix compilation of the lirc package in cases where
the build host has a different version of libusb-config
Merge branch 'tidy-minimal' of https://github.com/dgburr/buildroot-linux into tidy-minimal