Add rdpmc tests using libperf

[Nakamura-Shunsuke]

I will add rdpmc tests using libperf since libperf now supports rdpmc.
These tests are based on perf_event_tests/tests/rdpmc, which assumes that libperf is installed in the /usr/local/lib/ directory.

install command :

git clone https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
cd linux
make -C tools/lib/perf/ DESTDIR=/usr/local/lib/libperf/ install

[Nakamura-Shunsuke]

@deater ,Is there any missing information to merge the pull requests?
I would appreciate it if you could comment on it.

[Nakamura-Shunsuke]

@deater , Do you have any comments?
If there is no problem, Would you please merge it if there is no problem?

[robherring]

While I like the idea, I don't think duplicating the tests is a good idea.

[Nakamura-Shunsuke]

@robherring , Thank you for your comment.

While I like the idea, I don't think duplicating the tests is a good idea.

Do you mean that I should add tests using libperf to the existing source code in tests/rdpmc instead of creating a new tests/rdpmc_libperf?
Or does it mean that adding the same test case is not desirable?