perf bpf: Fix memory leaks relating to BTF.

BTF needs to be freed with btf__free().
Signed-off-by: NIan Rogers <irogers@google.com>
Reviewed-by: NKajol Jain <kjain@linux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20210826184833.408563-1-irogers@google.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/annotate.c

@@ -1833,7 +1833,7 @@ static int symbol__disassemble_bpf(struct symbol *sym,
 	ret = 0;
 out:
 	free(prog_linfo);
-	free(btf);
+	btf__free(btf);
 	fclose(s);
 	bfd_close(bfdf);
 	return ret;

tools/perf/util/bpf-event.c

@@ -296,7 +296,7 @@ static int perf_event__synthesize_one_bpf_prog(struct perf_session *session,
 
 out:
 	free(info_linear);
-	free(btf);
+	btf__free(btf);
 	return err ? -1 : 0;
 }
 
@@ -486,7 +486,7 @@ static void perf_env__add_bpf_info(struct perf_env *env, u32 id)
 	perf_env__fetch_btf(env, btf_id, btf);
 
 out:
-	free(btf);
+	btf__free(btf);
 	close(fd);
 }