simpleperf: support --clockid option in record cmd.

Setting clockid is supported in kernel 4.x.
Whether it is supported by the kernel can be checked
via `simpleperf list --show-features`.

Bug: http://b/65214671
Test: run simpleperf_unit_test.
Change-Id: I6f312cc62893af0fa5092ed91434b6df46435d7f
5 files changed