Issue #8281: rename test_gdb_sample.py to gdb_sample.py, otherwise it gets picked

as a regular test by regrtest.py, and fails.

diff --git a/Lib/test/test_gdb_sample.py b/Lib/test/gdb_sample.py
similarity index 100%
rename from Lib/test/test_gdb_sample.py
rename to Lib/test/gdb_sample.py