Similarly to c48f8a6462 (package/m4: fix build on host with glibc-2.28),
backport the two fixes fromn gnulib upstream, that allows building
host-bison on systems using glibc 2.28.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Reported-by: c32 on IRC
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
