Add Hifi compiled runtime @bypass-pytorch-oss-checks @bypass-github-export-checks (pytorch#14628)

Summary:

As title

Same as the libraries one level up, but these are compiled for HiFi

Reviewed By: digantdesai, mergennachin

Differential Revision: D82602663

Author: JakeStevens

backends/nxp/runtime/targets.bzl

@@ -15,6 +15,7 @@ def define_common_targets():
         labels = [ci.skip_target()],
         visibility = [
             "//executorch/backends/nxp/runtime/fb:nxp_fb_backend",
+            "//executorch/backends/nxp/runtime/fb:nxp_hifi_fb_backend",
             "@EXECUTORCH_CLIENTS",
         ],
         deps = [