perf tools: Use just forward declarations for struct thread where possible
Removing various instances of unnecessary includes, reducing the maze of
header dependencies.
Link: http://lkml.kernel.org/n/tip-hwu6eyuok9pc57alookyzmsf@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 2944458..cf0186a 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -9,6 +9,7 @@
#include "evsel.h"
#include "annotate.h"
#include "srcline.h"
+#include "thread.h"
#include "ui/progress.h"
#include <errno.h>
#include <math.h>