fix rebuild patches and rebuild current patches

Spigot-Server-Patches/Catch-Async-PlayerChunkMap-operations.patch

@@ -21,6 +21,4 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          ChunkCoordIntPair chunkcoordintpair = playerchunk.a();
          long i = d(chunkcoordintpair.x, chunkcoordintpair.z);
  
--- 
-2.5.4 (Apple Git-61)
-
+--

rebuildPatches.sh

@@ -30,6 +30,8 @@ function savePatches {
     target=$2
     echo "Formatting patches for $what..."
     cd "$basedir/$target"
+
+    rm -rf "$basedir/${what_name}-Patches/*.patch"
     git format-patch --no-stat -N -o "$basedir/${what_name}-Patches/" upstream/upstream >/dev/null
     cd "$basedir"
     git add -A "$basedir/${what_name}-Patches"