perf symbols: Fix type error when reading a build-id

This was benign, but wrong. The build-id should live in a char[], not a char*[]
Signed-off-by: Dima Kogan <dima@secretsauce.net>
Link: http://lkml.kernel.org/r/87si6pfwz4.fsf@secretsauce.netSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/symbol-minimal.c

@@ -337,7 +337,7 @@ int dso__load_sym(struct dso *dso, struct map *map __maybe_unused,
 		  symbol_filter_t filter __maybe_unused,
 		  int kmodule __maybe_unused)
 {
-	unsigned char *build_id[BUILD_ID_SIZE];
+	unsigned char build_id[BUILD_ID_SIZE];
 	int ret;
 
 	ret = fd__is_64_bit(ss->fd);