perf ui: Move ui_helpline routines to separate file in util/ui/

LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/ui/helpline.h

@@ -0,0 +1,9 @@
+#ifndef _PERF_UI_HELPLINE_H_
+#define _PERF_UI_HELPLINE_H_ 1
+
+void ui_helpline__pop(void);
+void ui_helpline__push(const char *msg);
+void ui_helpline__fpush(const char *fmt, ...);
+void ui_helpline__puts(const char *msg);
+
+#endif /* _PERF_UI_HELPLINE_H_ */