Add Core ML fp16 export (ExecuTorch 1.4.1)

.gitattributes

@@ -35,3 +35,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *tfevents* filter=lfs diff=lfs merge=lfs -text
 selfie-segmentation.pte filter=lfs diff=lfs merge=lfs -text
 xnnpack/selfie_segmentation_xnnpack_fp32.pte filter=lfs diff=lfs merge=lfs -text
+coreml/selfie_segmentation_coreml_fp16.pte filter=lfs diff=lfs merge=lfs -text

coreml/selfie_segmentation_coreml_fp16.pte

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4c656da9cf2bb2cab3e8db2faf72212297640c6a91f6d8a21a772fd54a3f3e8d
+size 614993