Retry RemoveFile on WindowsError.
Retry RemoveFile on WindowsError.

Since it is not possible to remove a file opened by other process
on Windows, let it retry on RemoveFile failure.

BUG=https://code.google.com/p/nativeclient/issues/detail?id=3934

Review URL: https://codereview.chromium.org/581063002

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@13798 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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