[Bug bootstrap/7125] libz is built even if configured with --with-system-zlib

[richard.purdie at linuxfoundation dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=7125

--- Comment #11 from Richard Purdie <richard.purdie at linuxfoundation dot org> 2012-02-06 16:23:16 UTC ---
Sorry, my previous report should be disregarded as it was user error. The
option does appear to work for me, removing the zlib compile where it was
previously present.