Android: Comments on ashmem implementation

From mailing list:

-1:

• need to use qt_safe_ {open,close}
• why the strlcopy? Can't it pass the name parameter?
• "static" missing in all functions
• coding style
• there's a QString creation between the failing system call and checking of
  errno. That is a bad idea, since malloc() can modify errno. Refactor
  setErrorString.
  -> additionally, merge it with the _unix implementation.
• the pin / unpin functions seem to be wrongly used