Fix examples

[ishiy1993]

python3.9以降ではexamplesの一部がエラーになっていたので修正する。

[ishiy1993]

bookworm 64bit:

(venv) pi@rpios-bookworm-20250107:~/py-videocore6 $ python3 examples/sgemm.py
==== sgemm example (1024x1024 times 1024x1024) ====
numpy: 0.2583 sec, 8.326 Gflop/s
QPU:   0.8022 sec, 2.681 Gflop/s
Minimum absolute error: 0.0
Maximum absolute error: 0.0003814697265625
Minimum relative error: 0.0
Maximum relative error: 0.13134673237800598
(venv) pi@rpios-bookworm-20250107:~/py-videocore6 $ python3 examples/summation.py
==== summaton example (32.0 Mi elements) ====
Preparing for buffers...
Executing on QPU...
0.04790381399999433 sec, 2801.817158024534 MB/s
(venv) pi@rpios-bookworm-20250107:~/py-videocore6 $ python3 examples/memset.py
==== memset example (64.0 MiB) ====
Preparing for buffers...
Executing on QPU...
0.028210215000001426 sec, 2378.885237138271 MB/s
(venv) pi@rpios-bookworm-20250107:~/py-videocore6 $ python3 examples/scopy.py
==== scopy example (16.0 Mi elements) ====
Preparing for buffers...
Executing on QPU...
0.04140828499998861 sec, 1620.6627248633565 MB/s

buster 32bit:

pi@actsim-buster-20250109:~/py-videocore6 $ PYTHONPATH=. python3 examples/sgemm.py
==== sgemm example (1024x1024 times 1024x1024) ====
numpy: 0.2217 sec, 9.701 Gflop/s
QPU:   0.59 sec, 3.645 Gflop/s
Minimum absolute error: 0.0
Maximum absolute error: 0.00040435791015625
Minimum relative error: 0.0
Maximum relative error: 0.16618169844150543
pi@actsim-buster-20250109:~/py-videocore6 $ PYTHONPATH=. python3 examples/summation.py
==== summaton example (32.0 Mi elements) ====
Preparing for buffers...
Executing on QPU...
examples/summation.py:177: RuntimeWarning: overflow encountered in long_scalars
  assert int(sum(Y.astype(int))) % 2**32 == (length - 1) * length // 2 % 2**32
0.01958620300000291 sec, 6852.667053434504 MB/s
pi@actsim-buster-20250109:~/py-videocore6 $ PYTHONPATH=. python3 examples/memset.py
==== memset example (64.0 MiB) ====
Preparing for buffers...
Executing on QPU...
0.0183182410000029 sec, 3663.4993501826607 MB/s
pi@actsim-buster-20250109:~/py-videocore6 $ PYTHONPATH=. python3 examples/scopy.py
==== scopy example (16.0 Mi elements) ====
Preparing for buffers...
Executing on QPU...
0.028704903999994258 sec, 2337.8884667237844 MB/s