perf tools: Fix cache.h include directive

perf tools: Fix cache.h include directive

Change the include path so that progress.c can find cache.h since it was
previously searching in the wrong directory.

Committer notes:

  $ ls -la tools/perf/ui/../cache.h
  ls: cannot access 'tools/perf/ui/../cache.h': No such file or directory

So it really should include ../../util/cache.h, or plain cache.h, since
we have -Iutil in INC_FLAGS in tools/perf/Makefile.config

Signed-off-by: Numfor Mbiziwo-Tiapo <nums@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>,
Cc: Luke Mujica <lukemujica@google.com>,
Cc: Stephane Eranian <eranian@google.com>
To: Ian Rogers <irogers@google.com>
Link: https://lkml.kernel.org/n/tip-pud8usyutvd2npg2vpsygncz@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>