setfattr: new applet

setfattr: new applet

function                                             old     new   delta
setfattr_main                                          -     189    +189
packed_usage                                       31516   31588     +72
setxattr                                               -      53     +53
lsetxattr                                              -      53     +53
removexattr                                            -      37     +37
lremovexattr                                           -      37     +37
applet_names                                        2649    2658      +9
find_applet_by_name                                  124     128      +4
applet_main                                         1532    1536      +4
------------------------------------------------------------------------------
(add/remove: 7/0 grow/shrink: 4/0 up/down: 458/0)             Total: 458 bytes

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