Otherwise systemd uses AC_PROG_PATH and finds it in the sysroot, which won't
work on the target.
(From OE-Core rev: 54760c783089c98cc6eda1933393ac3cb49bcaed)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>