Also include here is a test module

The testrprobe.ko is a generic test module. One could use this module to 
insert an exit probe to any function in the kernel.
For example :
insmod test_rprobe.ko <entryaddr=address for func entry>
or use the included loadtestrprobe.sh script
./loadtestrprobe.sh <function name>

One good example is to see what kind of page fault is encountered
./loadtestrprobe.sh handle_mm_fault

Signed-off-by: hien Nguyen <hien@us.ibm.com>