Disable zlib in binutils build only on linux (it fails on windows)
Disable zlib in binutils build only on linux (it fails on windows)

R=jvoung@chromium.org,bradn
TEST=windows tc build
BUG=none

Review URL: https://chromiumcodereview.appspot.com/10919197

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@9692 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client