perf block-range: Add missing headers

Some are being obtained indirectly and as we prune unnecessary includes,
this stops working, fix it by adding the headers for things used in
these file.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-1p65lyeebc2ose0lbozvemda@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/block-range.c

@@ -1,6 +1,8 @@
 // SPDX-License-Identifier: GPL-2.0
 #include "block-range.h"
 #include "annotate.h"
+#include <assert.h>
+#include <stdlib.h>
 
 struct {
 	struct rb_root root;

tools/perf/util/block-range.h

@@ -2,7 +2,11 @@
 #ifndef __PERF_BLOCK_RANGE_H
 #define __PERF_BLOCK_RANGE_H
 
-#include "symbol.h"
+#include <stdbool.h>
+#include <linux/rbtree.h>
+#include <linux/types.h>
+
+struct symbol;
 
 /*
  * struct block_range - non-overlapping parts of basic blocks