#8 configuration patch for libtool-2

[MartinKG]

autoreconf fails with:
+ autoreconf -i
libtoolize: putting macros in AC_CONFIG_MACRO_DIR, `m4'.
libtoolize: copying file `m4/libtool.m4'
libtoolize: copying file `m4/ltoptions.m4'
libtoolize: copying file `m4/ltsugar.m4'
libtoolize: copying file `m4/ltversion.m4'
libtoolize: copying file `m4/lt~obsolete.m4'
configure.in:26: required file `../ltmain.sh' not found
autoreconf: automake failed with exit status: 1

The cause is a combination of this package's configure.in exploiting bugs in
the ancient versions of the autotools the original upstream author had used and
incompatibilities of this package's configuration with libtool-2.

[MartinKG]