perf header: Move perf_version_string declaration

Move to match the definition in header.c.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Chengdong Li <chengdongli@tencent.com>
Cc: Denis Nikitin <denik@chromium.org>
Cc: Florian Fischer <florian.fischer@muhq.space>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin Liška <mliska@suse.cz>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Raul Silvera <rsilvera@google.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230410162511.3055900-2-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-version.c

 // SPDX-License-Identifier: GPL-2.0
 #include "builtin.h"
-#include "perf.h"
 #include "color.h"
+#include "util/header.h"
 #include <tools/config.h>
 #include <stdbool.h>
 #include <stdio.h>

tools/perf/perf.h

@@ -10,7 +10,6 @@
 
 extern const char *input_name;
 extern bool perf_host, perf_guest;
-extern const char perf_version_string[];
 
 enum perf_affinity {
 	PERF_AFFINITY_SYS = 0,

tools/perf/util/header.h

@@ -115,6 +115,8 @@ struct perf_session;
 struct perf_tool;
 union perf_event;
 
+extern const char perf_version_string[];
+
 int perf_session__read_header(struct perf_session *session, int repipe_fd);
 int perf_session__write_header(struct perf_session *session,
 			       struct evlist *evlist,