Fix a whole bunch of issues exposed by ziglang/zig#9191

This also includes a workaround for the fact that @"type" refers to the builtin
and not to a variable called "type". See ziglang/zig#2897.

generator/vulkan/c_parse.zig

@@ -514,7 +514,7 @@ pub fn parseVersion(xctok: *XmlCTokenizer) ![4][]const u8 {
         return error.InvalidVersion;
     }
 
-    const name = try xctok.expect(.name);
+    _ = try xctok.expect(.name);
     const vk_make_version = try xctok.expect(.type_name);
     if (!mem.eql(u8, vk_make_version.text, "VK_MAKE_API_VERSION")) {
         return error.NotVersion;