perf tests: Add a testcase for histogram output sorting

With new output fields option, its internal implementation was changed
so add a new testcase to verify whether it breaks things.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1400480762-22852-21-git-send-email-namhyung@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>

diff --cc tools/perf/Makefile.perf
Simple merge

diff --cc tools/perf/tests/builtin-test.c
Simple merge

diff --cc tools/perf/tests/hists_common.c
Simple merge

diff --cc tools/perf/tests/hists_filter.c
Simple merge

diff --cc tools/perf/tests/hists_link.c
Simple merge

diff --cc tools/perf/tests/hists_output.c
Simple merge

diff --cc tools/perf/tests/tests.h
Simple merge