MFC r282248,r282258,r282282:

r282248 (by oshogbo):

Style fixes.

r282258 (by oshogbo):

Save errno from close override.

r282282 (by oshogbo):

Rename macros to use prefix ERRNO. Add macro ERRNO_SET. Now
ERRNO_{RESTORE/SAVE} must by used together, additional variable is not
needed. Always use ERRNO_{SAVE/RESTORE/SET} macros.