[LTP] [PATCH] Fix prctl02

[Jan Stancek]

----- Original Message -----
> The prctl() system call takes 5 integer arguments but only 3 of them were
> passed in the test. This means that the system call read random garbage
> from stack in place of the two missing arguments and failed even on some
> perfectly valid combinations of arguments on some platforms.
> 
> - Fixed arguments in test case 9 (second PR_SET_NO_NEW_PRIVS)
> - Dropped test case 13 (PR_CAP_AMBIENT) because the args are valid
> - Dropped test case 14 (PR_GET_SPECULATION_CTRL) because the args are valid

Can we make them invalid and keep the test cases?
For example:
 PR_CAP_AMBIENT arg2 could be num_invalid
 PR_GET_SPECULATION_CTRL arg3 could be num_1

The rest looks good to me.