nanddump: new applet

nanddump: new applet

function                                             old     new   delta
nandwrite_main                                       418     936    +518
dump_bad                                               -     119    +119
packed_usage                                       27752   27810     +58
next_good_eraseblock                                  84     106     +22
applet_names                                        2366    2375      +9
applet_main                                         1380    1384      +4
applet_nameofs                                       690     692      +2
bbconfig_config_bz2                                 4932    4922     -10
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 6/1 up/down: 732/-10)           Total: 722 bytes

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>