Add QAIRT 2.40 unsigned v81 DSP runtime lib libQnnHtpV81Skel.so (on-demand skel delivery)

.gitattributes

@@ -44,3 +44,4 @@ ip/ip_resampler.mnn filter=lfs diff=lfs merge=lfs -text
 ip/clip_vision_vith.mnn.weight filter=lfs diff=lfs merge=lfs -text
 qnn_runtime/2.40/v75/libQnnHtpV75Skel.so filter=lfs diff=lfs merge=lfs -text
 qnn_runtime/2.40/v75/libQnnHtpV75.so filter=lfs diff=lfs merge=lfs -text
+qnn_runtime/2.40/v81/libQnnHtpV81Skel.so filter=lfs diff=lfs merge=lfs -text

qnn_runtime/2.40/v81/libQnnHtpV81Skel.so

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2dff3367e70920742e8122cdbebfe4d5f9aa1d88d863a200b663842551d2b6f0
+size 10561352