event: Drop the path when checking event-list filenames

This path does not seem to be present in clang-14 for some reason. Relax
the regular expression so that the test works, at least for non-LTO.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/test/py/tests/test_event_dump.py b/test/py/tests/test_event_dump.py
index e63c25d..674df2e 100644
--- a/test/py/tests/test_event_dump.py
+++ b/test/py/tests/test_event_dump.py
@@ -16,7 +16,7 @@
     out = util.run_and_log(cons, ['scripts/event_dump.py', sandbox])
     expect = '''.*Event type            Id                              Source location
 --------------------  ------------------------------  ------------------------------
-EVT_FT_FIXUP          bootmeth_vbe_ft_fixup           .*boot/vbe_fixup.c:.*
-EVT_FT_FIXUP          bootmeth_vbe_simple_ft_fixup    .*boot/vbe_simple.c:.*
-EVT_MISC_INIT_F       sandbox_misc_init_f             .*arch/sandbox/cpu/start.c:'''
+EVT_FT_FIXUP          bootmeth_vbe_ft_fixup           .*vbe_fixup.c:.*
+EVT_FT_FIXUP          bootmeth_vbe_simple_ft_fixup    .*vbe_simple.c:.*
+EVT_MISC_INIT_F       sandbox_misc_init_f             .*start.c:'''
     assert re.match(expect, out, re.MULTILINE) is not None