Increasing ninja to -j50 to lean on goma more.
Increasing ninja to -j50 to lean on goma more.

BUG=https://code.google.com/p/nativeclient/issues/detail?id=3933
TEST=trybots
R=mseaborn@chromium.org

Review URL: https://codereview.chromium.org/583873002

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@13851 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client