kfdtest: add log message to KFDExceptionTest

[WHY]
These tests force HW exceptions in the GPU driver. Some of these
exceptions might print page fault error messages at kernel level.
These are expected errors due to the nature of the tests, but still
might cause confusion to users.

[HOW]
Add log message to warn the user about these kernel error messages.

Signed-off-by: Alex Sierra <alex.sierra@amd.com>
Change-Id: I8eef87b83939e37230da0c374c2f77d2d484baa9

tests/kfdtest/src/KFDExceptionTest.cpp

@@ -33,6 +33,9 @@ void KFDExceptionTest::SetUp() {
 
     KFDBaseComponentTest::SetUp();
 
+    LOG() << "This Exception test might cause expected page fault "
+             "error logs at kernel level." << std::endl;
+
     ROUTINE_END
 }