Fix for missing ' executorch.backends.arm.common.type' (See #15367)

Differential Revision: D85886023

Pull Request resolved: #15478

Author: psiddh

backends/arm/TARGETS

@@ -20,6 +20,7 @@ runtime.python_library(
     srcs = [
         "common/__init__.py",
         "common/debug.py",
+        "common/type.py",
     ],
     deps = [
         "fbsource//third-party/tosa_tools:serializer",