Fix spec file patch so it is idempotent as intended
Fix spec file patch so it is idempotent as intended

We were previously checking for the sed target
expression in the specs file to determine if it
had been already patched but this contains escape
characters that were causing the check to always
fail an repeatedly patch the specs file.

R=binji@chromium.org

Review URL: https://codereview.chromium.org/733263003

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