Update Project C patchset to v5.10-lts-r3 (#321)

* Update Project C patchset to v5.10-lts-r3 - https://gitlab.com/alfredchen/projectc/-/blob/master/5.10-lts/prjc_v5.10-lts-r3.patch

* Use our internal naming scheme

Else the patch won't be used

Co-authored-by: Tk-Glitch <ti3nou@gmail.com>

linux-tkg-config/prepare

@@ -431,7 +431,7 @@ _tkg_srcprep() {
   elif [ "$_basever" = "59" ]; then
     rev=3
   elif [ "$_basever" = "510" ]; then
-    rev=2
+    rev=3
   elif [ "$_basever" = "511" ]; then
     rev=3
   elif [ "$_basever" = "512" ]; then