Cross Reference: /external/libpcap/missing

`Name`	`Date`	`Size`
Up to higher level directory
`getopt.c`	21-Aug-2018	`3.9K`
`getopt.h`	21-Aug-2018	`242`
`snprintf.c`	21-Aug-2018	`12.6K`
`strtok_r.c`	21-Aug-2018	`2.6K`
`win_snprintf.c`	21-Aug-2018	`672`