683c462803
In donut, OTA installation often encounters the write() system call doing short writes -- which is legal but unexpected -- or failing with ENOSPC when plenty of space is available. Passing aligned memory buffers to write() appears to prevent (or at least reduce the frequency) of these problems. b/1833052 has been filed to look at the underlying problem, but this change aligns buffers we use with write() so we can OTA for now (or see if this problem still occurs).