ash: [REDIR] Remove redundant CLOEXEC calls

ash: [REDIR] Remove redundant CLOEXEC calls

Upstream commit:

    Date: Sun, 6 May 2007 19:28:56 +1000
    [REDIR] Remove redundant CLOEXEC calls

    Now that we're marking file descriptors as CLOEXEC in savefd, we no longer
    need to close them on exec or in setinputfd.

function                                             old     new   delta
ash_main                                            1478    1492     +14
setinputfile                                         224     226      +2
readtoken1                                          2752    2750      -2
shellexec                                            208     198     -10
clearredir                                            30       -     -30
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 2/2 up/down: 16/-42)            Total: -26 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>