The recent change to epoll on Linux and kqueue on Mac OS for getting
notifications from file descriptors caused the redirection of stdin,
stdout and stderr for the stand alone VM to stop working.
On Linux epoll failed when file descriptor 0, 1 or 2 redirected from
or to a file war registered. On Mac OS there was just no events
generated from kqueue.
The streams created for stdio, stdout and stderr is now of the correct
type and for file redirections no longer a socket object holding a
file descriptor for a regular file.
Added testing of stdio redirection using both pipes and files. These
tests are currently skipped on Windows.
Fixed handlin of short socket read when reading the process exit code.
Always close the socket port when not waiting for any events.
R=iposva@google.com
BUG=
TEST=
Review URL: https://chromiumcodereview.appspot.com//9360040
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@4226 260f80e4-7a28-3924-810f-c04153c831b5
sgjesse@google.com
b4d571dcdd