Merge 1447 "Fix call to rt_sigaction"

> Fix call to rt_sigaction
> 
> Despite the fact that many places imply that sigaction and rt_sigaction
> are essentially the same, rt_sigaction's signature is actually
> different-- it takes the size of the kernel's sigset_t as an extra argument.
> 
> BUG=473973
> 

TBR=cjhopman@chromium.org

Review URL: https://breakpad.appspot.com/5784002

git-svn-id: http://google-breakpad.googlecode.com/svn/branches/chrome_42@1448 4c0a9323-5329-0410-9bdc-e9ce6186880e
1 file changed