scripts/tags.sh: Add magic for trace-events for etags too

Seems that Peter Zijlstra treats us emacs users as second class
citizens and the commit:

 commit 1566412
 Author: Peter Zijlstra <peterz@infradead.org>
 scripts/tags.sh: Add magic for trace-events

only updated ctags (for vim) and did not do the work to let us
lowly emacs users benefit from such a change.

Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

scripts/tags.sh

@@ -152,7 +152,9 @@ emacs()
 {
 	all_sources | xargs $1 -a                               \
 	--regex='/^ENTRY(\([^)]*\)).*/\1/'                      \
-	--regex='/^SYSCALL_DEFINE[0-9]?(\([^,)]*\).*/sys_\1/'
+	--regex='/^SYSCALL_DEFINE[0-9]?(\([^,)]*\).*/sys_\1/'   \
+	--regex='/^TRACE_EVENT(\([^,)]*\).*/trace_\1/'		\
+	--regex='/^DEFINE_EVENT([^,)]*, *\([^,)]*\).*/trace_\1/'
 
 	all_kconfigs | xargs $1 -a                              \
 	--regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'