[PATCH] selftests/damon: fix selftests by installing drgn related script

[Sang-Heon Jeon <ekffu200098@gmail.com>]

drgn_dump_damon_status is not installed while kselftest setup.
It can breaks other tests which depend on drgn_dump_damon_status.
Install drgn_dump_damon_status files to fix broken test.

Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com>
Cc: Alexandre Ghiti <alexghiti@rivosinc.com>
---
While setup kselftest executable environment and test this patch [1],
I found similiar issue. Honestly, I don't know exact solution for this
situation. So I just make a new patch. Sorry if it is wrong direction,
then please let me know how to do next.

[1] https://lore.kernel.org/damon/20250812-alex-fixes_manual-v1-1-c4e99b1f80e4@rivosinc.com/

---
 tools/testing/selftests/damon/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/damon/Makefile b/tools/testing/selftests/damon/Makefile
index 44a4a819df55..029de547f31c 100644
--- a/tools/testing/selftests/damon/Makefile
+++ b/tools/testing/selftests/damon/Makefile
@@ -4,6 +4,7 @@
 TEST_GEN_FILES += access_memory access_memory_even
 
 TEST_FILES = _damon_sysfs.py
+TEST_FILES += drgn_dump_damon_status.py
 
 # functionality tests
 TEST_PROGS += sysfs.sh
-- 
2.43.0