Add *.pyc back to the .gitignore file

Python still dumps its bytecode into the source directory, so
we should continue to ignore the *.pyc files.

Fixes: 0e72b7df4d ("Simplify the .gitignore file")
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20200919101859.28739-1-thuth@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

.gitignore

@@ -1,5 +1,6 @@
 /GNUmakefile
 /build/
+*.pyc
 .sdk
 .stgit-*
 .git-submodule-status