After the update of GNU automake, the flex configure fails with
configure.ac:31: error: version mismatch. This is Automake 1.15.1,
configure.ac:31: but the definition used by this AM_INIT_AUTOMAKE
configure.ac:31: comes from Automake 1.15.
Apply the autoreconf host fixup to properly regenerate configure before
to avoid triggering the version mismatch. Also refresh the patch while
we're at it.
Fixes FS#885.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
91e262c6b3