Fixed configure script

git-svn-id: https://forth-ev.de/repos/bigforth@2504 3b8d8251-53f3-0310-8f3b-fd1cb8370982

configure.in

@@ -48,7 +48,7 @@ esac
 test "x$prefix" = xNONE && prefix=$ac_default_prefix
 exec_prefix=$prefix
 libdir=${libdir/64/}
-libdirpath=${libdir}
+libdirpath=`eval echo ${libdir}`
 
 AC_CHECK_LIB(dl,dlopen)
 AC_SUBST(EXTFLAGS)