tweak to build libresample on FreeBSD 5.4 thanks to xachen.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@924 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/libresample-0.1.3.build.sh

+#!/bin/sh
 ./configure $@
-make
+$MAKE
 cp *.a $PREFIX/lib
 cp include/* $PREFIX/include
 ranlib $PREFIX/lib/libresample.a