Pass more conservative options to pip initially.
Pass more conservative options to pip initially.

The version of pip downloaded initially doesn't seem
to support the --no-compile option.
Dropping this until we know what version we're on.

BUG=None
TEST=local
R=sbc@chromium.org

Review URL: https://codereview.chromium.org/872293003

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