Add patch to fix building rust 1.25.x and newer

rust-lang/rust#51698

Author: aclemons

rust/rust.SlackBuild

@@ -235,6 +235,11 @@ if [ "$LOCAL_BOOTSTRAP" = "yes" ] ; then
   sed -i "s|^\(extended = true\)$|\1\nrustc = \"/usr/bin/rustc\"\ncargo = \"/usr/bin/cargo\"|" config.toml
 fi
 
+
+if [ "$ARCH" = "x86_64" ] && [ "$LOCAL_BOOTSTRAP" = "yes" ] && [ "$(echo "$VERSION" | cut -d. -f 1)" -eq 1 ] && [ "$(echo "$VERSION" | cut -d. -f 2)" -gt 24 ] ; then
+  zcat $CWD/slackware64_local_bootstrap.diff.gz | patch -p1 --verbose || exit 1
+fi
+
 chown -R root:root .
 find -L . \
  \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \