Move ipc/semaphore/ tests to syscalls/ipc/semop/ and clean them up

[metan-ucw]

There is no point in having two different directories with semop() testcaes so it would make sense to move these two tests into the syscalls/ipc/semop/ directory as semop04 and semop05 and then rewrite them (in a separate patch) to the new test library.

Also the runtest files should be updated accordingly, these should be put into syscalls and syscalls-ipc instead of the nearly empty ipc runtest file.

[coolgw]

checking.

[coolgw]

https://patchwork.ozlabs.org/project/ltp/patch/[email protected]/

[Martchus]

The linked patch is in review state "rejected" but it looks like it has been merged nevertheless as commit 5abf2a17a973426645c86ae68444d2a26d39b402 which also updates runtests. So is there anything left to do?