perf annotate browser: Use a vertical line as percentage separator

Where we had ':'.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-l8gbejzpglnwiwk43450h31g@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/ui/browsers/annotate.c

@@ -71,8 +71,10 @@ static void annotate_browser__write(struct ui_browser *self, void *entry, int ro
 		slsmg_write_nstring(" ", 9);
 	}
 
-	SLsmg_write_char(':');
-	slsmg_write_nstring(" ", 8);
+	SLsmg_set_char_set(1);
+	SLsmg_write_char(SLSMG_VLINE_CHAR);
+	SLsmg_set_char_set(0);
+	SLsmg_write_char(' ');
 
 	/* The scroll bar isn't being used */
 	if (!self->navkeypressed)