This acinclude.m4 was actually a stale copy of upstream's generated aclocal.m4.
This generates correctly now, so there isn't a need to install this by hand
anymore.
(From OE-Core rev: 2d1948eb325bb769af97634f99efeffe3d43cfc9)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>