perf python: Fix the build on 32-bit arm by including missing "util/sample.h"

The 32-bit arm build system will complain:

  tools/perf/util/python.c:75:28: error: field ‘sample’ has incomplete type
     75 |         struct perf_sample sample;

However, arm64 build system doesn't complain this.

The root cause is arm64 define "HAVE_KVM_STAT_SUPPORT := 1" in
tools/perf/arch/arm64/Makefile, but arm arch doesn't define this.  This
will lead to kvm-stat.h include other header files on arm64 build
system, especially "util/sample.h" for util/python.c.

This will try to directly include "util/sample.h" for "util/python.c" to
avoid such build issue on arm platform.
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: imx@lists.linux.dev
Link: https://lore.kernel.org/r/20240819023403.201324-1-xu.yang_2@nxp.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/python.c

@@ -20,6 +20,7 @@
 #include "util/env.h"
 #include "util/kvm-stat.h"
 #include "util/kwork.h"
+#include "util/sample.h"
 #include "util/lock-contention.h"
 #include <internal/lib.h>
 #include "../builtin.h"