change char *string = "foo" -> char string[] = "foo"

change char *string = "foo"  -> char string[] = "foo"
function                                             old     new   delta
xsetenv                                               45      44      -1
iproute_list_or_flush                               1834    1833      -1
ipaddr_modify                                       1915    1914      -1
ipaddr_list_or_flush                                1861    1860      -1
invarg                                                39      38      -1
do_set                                              1259    1258      -1
bb_verror_msg                                        268     267      -1
create_icmp_socket                                   142     140      -2
create_icmp6_socket                                  142     140      -2
bb_full_fd_action                                    324     322      -2
bb_path_mtab_file                                     10       -     -10
.rodata                                           214796  214720     -76
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/11 up/down: 0/-99)            Total: -99 bytes