[Crash-utility] [PATCH] Fixed the segment fault when ikconfig passed nonstandard values

[d.hatayama at fujitsu.com]

> Some strange reasons may cause kcore to collect some strange
> entries of ikconfig, such as CONFIG_SECU+[some hex data] causes

Could you tell me the example of such CONFIG_SEC+[some hex data] that
causes the val to have NULL. I tried to reproduce but failed.

> the 'val' to be NULL, and then crashes when strdup.


Thanks.
HATAYAMA, Daisuke