PATCH: PR libjava/32078: Update libtool in classpath

[Tom Tromey]

>>>>> "H.J." == H J Lu <hjl@lucon.org> writes:

H.J.> There is no need to add AC_CONFIG_AUX_DIR(../..) if the above is
H.J.> followed.

If the AC_CONFIG_AUX_DIR approach works, then let's use that.
This is better because it means future libtool upgrades won't require
extra hacks for libjava/classpath, and because it means less work when
importing a new Classpath.

If it doesn't work, let's copy the needed files there.

Can you try this?

Tom