Add luarocks to install luautf8, which is needed in the runtime

Author: hsource

Makefile

@@ -49,8 +49,11 @@ luacurl:
 
 # curl is used since mesonInstaller.sh copies over the shared library dylib
 # dylibbundler is used to copy over dylibs that lcurl.so uses
+# luautf8 is used at runtime; the version is picked to match the PathOfBuilding
+# version from https://github.com/PathOfBuildingCommunity/PathOfBuilding/blob/5eb8bd3bd2ad1b2ce0ee2f850e69b3197de8572c/Dockerfile#L35
 tools:
-	arch --x86_64 brew install qt@5 luajit zlib meson curl dylibbundler gcc@12
+	arch --x86_64 brew install qt@5 luajit zlib meson curl dylibbundler gcc@12 luarocks; \
+	luarocks install luautf8 0.1.6-1
 
 # We don't usually modify the PathOfBuilding directory, so there's rarely a
 # need to delete it. We separate it out to a separate task.