perf script: Output branch sample type

The type info is saved when using '-j save_type'. Output this in 'perf
script' so it can be accessed by other tools or for debugging.

It's appended to the end of the list of fields so any existing tools
that split on / and access fields via an index are not affected. Also
output '-' instead of 'N/A' when the branch type isn't saved because /
is used as a field separator.

Entries before this change look like this:

  0xaaaadb350838/0xaaaadb3507a4/P/-/-/0

And afterwards like this:

  0xaaaadb350838/0xaaaadb3507a4/P/-/-/0/CALL

or this if no type info is saved:

  0x7fb57586df6b/0x7fb5758731f0/P/-/-/143/-

Signed-off-by: James Clark <james.clark@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20220307171917.2555829-5-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-script.c

@@ -859,11 +859,12 @@ mispred_str(struct branch_entry *br)
 
 static int print_bstack_flags(FILE *fp, struct branch_entry *br)
 {
-	return fprintf(fp, "/%c/%c/%c/%d ",
+	return fprintf(fp, "/%c/%c/%c/%d/%s ",
 		       mispred_str(br),
 		       br->flags.in_tx ? 'X' : '-',
 		       br->flags.abort ? 'A' : '-',
-		       br->flags.cycles);
+		       br->flags.cycles,
+		       br->flags.type ? branch_type_name(br->flags.type) : "-");
 }
 
 static int perf_sample__fprintf_brstack(struct perf_sample *sample,