Bootstrap failure on FreeBSD

[Jason Bacon <bacon4000%gmail.com@localhost>]

FYI,

2016Q2 and current are failing to boostrap on FreeBSD 10.1 with 
undefined references to LZ*.

The patch below corrects this problem, but there's another that I 
haven't solved yet:

It doesn't seem to recognize clang as a viable compiler and attempts to 
install gcc3.

--- bootstrap.orig      2016-09-22 08:59:47.726119253 -0500
+++ bootstrap   2016-09-22 08:54:35.867144719 -0500
@@ -595,6 +595,7 @@
        set_opsys=no
        machine_arch=`uname -p`
        check_compiler=yes
+       LDFLAGS="$LDFLAGS -llz4"
        ;;
 FreeMiNT)
        root_group=root


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