add fixlibtool script

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4688 d0543943-73ff-0310-b7d9-9358b9ac24b2

build/fixlibtool.sh

+cd /tmp
+mkdir fix_libtool
+cd fix_libtool
+wget http://mirrors.kernel.org/gnu/libtool/libtool-1.5.22.tar.gz
+tar -zxvf libtool-1.5.22.tar.gz
+cd libtool-1.5.22
+./configure --prefix=/usr
+make
+make install
+cd /tmp
+rm -fr fix_libtool