Add support for build profiles.

Allow enabling or disabling specific classes (which will not be built).

tools/godotcpp.py

@@ -285,6 +285,15 @@ def options(opts, env):
         )
     )
 
+    opts.Add(
+        PathVariable(
+            "build_profile",
+            "Path to a file containing a feature build profile",
+            default=env.get("build_profile", None),
+            validator=validate_file,
+        )
+    )
+
     opts.Add(
         BoolVariable(
             key="use_hot_reload",