Without this, the font-util.m4 macro can be missing leading to an undefined
macro. The recipe will still build but generate an empty font-alias package
since the files are installed into "${D}@XORGROOTFONTDIR@".
(From OE-Core rev: 12dc7ae22ddaae0d79e0f86b66c1f5a9b18329f9)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>