Supress the two noisiest warnings on linux standalone builds.

Code might someday be made clean for -Wmissing-field-initializers
and -Wsign-compare, but for now this produces too much noise to be
useful.

The -Wmissing-field-initializers warning is misguided in a high
percentage of cases, and actually leads to bad fixes.

R=brucedawson@chromium.org

Review URL: https://codereview.chromium.org/1094713002
1 file changed