style: Various other PEP8 fixes in Python files

Done with `autopep8 --select=E7`, fixes:

- E701 - Put colon-separated compound statement on separate lines.
- E702 - Put semicolon-separated compound statement on separate lines.
- E703 - Put semicolon-separated compound statement on separate lines.
- E711 - Fix comparison with None.
- E712 - Fix (trivial case of) comparison with boolean.
- E713 - Fix (trivial case of) non-membership check.
- E721 - Fix various deprecated code (via lib2to3).

drivers/SCsub

@@ -5,31 +5,31 @@ Import('env')
 env.drivers_sources = []
 
 if ("builtin_zlib" in env and env["builtin_zlib"] == "yes"):
-    SConscript("zlib/SCsub");
+    SConscript("zlib/SCsub")
 
 # OS drivers
-SConscript('unix/SCsub');
-SConscript('windows/SCsub');
+SConscript('unix/SCsub')
+SConscript('windows/SCsub')
 
 # Sounds drivers
-SConscript('alsa/SCsub');
-SConscript('pulseaudio/SCsub');
+SConscript('alsa/SCsub')
+SConscript('pulseaudio/SCsub')
 if (env["platform"] == "windows"):
-    SConscript("rtaudio/SCsub");
+    SConscript("rtaudio/SCsub")
 if (env["xaudio2"] == "yes"):
-    SConscript("xaudio2/SCsub");
+    SConscript("xaudio2/SCsub")
 
 # Graphics drivers
-SConscript('gles2/SCsub');
-SConscript('gl_context/SCsub');
+SConscript('gles2/SCsub')
+SConscript('gl_context/SCsub')
 
 # Core dependencies
-SConscript("png/SCsub");
+SConscript("png/SCsub")
 
 # Tools override
 # FIXME: Should likely be integrated in the tools/ codebase
 if (env["tools"] == "yes"):
-    SConscript("convex_decomp/SCsub");
+    SConscript("convex_decomp/SCsub")
 
 if env['vsproj'] == "yes":
     env.AddToVSProject(env.drivers_sources)