Be more reliable about using the libtool version on the PATH when this
script is run.  Part of SF patch #465018.
diff --git a/expat/buildconf.sh b/expat/buildconf.sh
index e3df991..362ff81 100755
--- a/expat/buildconf.sh
+++ b/expat/buildconf.sh
@@ -19,6 +19,7 @@
 # --copy to avoid symlinks; we want originals for the distro
 # --automake to make it shut up about "things to do"
 #
+(cd conftools/; rm -f ltmain.sh ltconfig)
 $libtoolize --force --copy --automake
 
 ltpath=`dirname $libtoolize`