Always run C API generator in suite dir

Author: fangerer

mx.graalpython/mx_graalpython.py

@@ -2733,7 +2733,7 @@ def generate_capi_forwards(args, extra_vm_args=None, env=None, jdk=None, extra_d
     vm_args.append("com.oracle.graal.python.builtins.objects.cext.capi.CApiCodeGen")
 
     print("\nGraalPython needs to be built before executing this command. If you encounter build errors because of changed builtin definitions, manually remove the contents of com.oracle.graal.python.builtins.modules.cext.PythonCextBuiltinRegistry.createBuiltinNode before building.\n")
-    return mx.run_java(vm_args + graalpython_args, jdk=jdk, env=env, **kwargs)
+    return mx.run_java(vm_args + graalpython_args, jdk=jdk, env=env, cwd=SUITE.dir, **kwargs)
 
 
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