opengl: Mimetype no longer detects shared libraries after pie issues

pkgs/opengl/insert-virtualgl.sh

@@ -149,12 +149,7 @@ VGL_isTestAllS() {
 #
 VGL_isElfBin() {
   declare file=$1
-  case "$(file -b -N --mime-type "$file")" in
-    application/x-executable | application/x-pie-executable)
-      return 0 ;;
-    *)
-      return 1 ;;
-  esac
+  patchelf --print-interpreter "$file" &>/dev/null
 }
 
 # Check for libGL