dbginfo: Added collection of /proc/softirqs

Signed-off-by: Sa Liu <saliu@de.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

scripts/dbginfo.sh

@@ -269,6 +269,7 @@ PROCFILES="\
   /proc/schedstat\
   /proc/service_levels\
   /proc/slabinfo\
+  /proc/softirqs\
   /proc/stat\
   /proc/swaps\
   /proc/sys/kernel\