Remove RunWithRetry on 'error 5' from build_nexe.
Remove RunWithRetry on 'error 5' from build_nexe.

Because relevant cygwin bug was fixed long time ago.

BUG= https://code.google.com/p/nativeclient/issues/detail?id=1918
TEST= bots
R=halyavin@google.com

Review URL: https://codereview.chromium.org/22875051

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@12051 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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