.gitignore: ignore Python compiled bytecode

While the building system doesn't create any Python JIT bytecode,
if one manually runs kernel-doc.py or get_abi.py, Python will,
by default, create a bytecode and store it under scripts/lib/*.

This is normal, and not controlled by the Kernel itself. So,
add *.pyc as an extension to be ignored.

Signed-off-by: Mauro Carvalho Chehab <[e-mail]>
Reviewed-by: Miguel Ojeda <[e-mail]>
Signed-off-by: Jonathan Corbet <[e-mail]>
Message-ID: <ae1c54[e-mail]>

.gitignore

···
 *.o
 *.o.*
 *.patch
+*.pyc
 *.rmeta
 *.rpm
 *.rsi