Disabling samba build on mac.
Disabling samba build on mac.

The samba build doesn't work on mac at the moment.
(we don't have trybots for this config).

http://chromegw.corp.google.com/i/client.nacl.ports/builders/mac-glibc-1/builds/851/steps/glibc%20samba/logs/stdio

Disabling on mac for now.

TBR=sbc@chromium.org,zentaro@chromium.org
BUG=None
TEST=None

Review URL: https://codereview.chromium.org/1088813002

yeyus/naclports,yeyus/naclports,yeyus/naclports,yeyus/naclports,yeyus/naclports,yeyus/naclports