ANDROID: softirq: Export irq_handler_exit tracepoint

Export irq_handle_exit tracepoint, so that vendor modules
can register probes for this tracepoint.

Bug: 175936268
Change-Id: I8e1eaffb7dd2f257e9c09412aad54ecca62bf019
Signed-off-by: Changki Kim <changki.kim@samsung.com>

kernel/softirq.c

@@ -30,6 +30,7 @@
 #include <trace/events/irq.h>
 
 EXPORT_TRACEPOINT_SYMBOL_GPL(irq_handler_entry);
+EXPORT_TRACEPOINT_SYMBOL_GPL(irq_handler_exit);
 
 /*
    - No shared variables, all the data are CPU local.