add missing files to the install dir

We need
- src/layer/tile/CanvasTileUtils.js (included from TileWorker.js)
and
- src/layer/tile/TileWorker.js (because we have
  `this._worker = new Worker('src/layer/tile/TileWorker.js');`
  in bundle.js

These files have to be present separately in install dir.
Whether it's a permanent solution, or a temporary hack, I don't know.

Signed-off-by: Andras Timar <andras.timar@collabora.com>
Change-Id: I9d0d21463be0cef10ff95a0cd80226a5fc29fa75

browser/Makefile.am

@@ -911,6 +911,9 @@ install-data-hook:
 		--exclude='multidocs.html' \
 		--exclude='tsconfig.tsbuildinfo' \
 		dist $(DESTDIR)$(pkgdatadir)/browser/;
+	mkdir -p $(DESTDIR)$(pkgdatadir)/browser/dist/src/layer/tile;
+	cp -a dist/src/layer/tile/CanvasTileUtils.js $(DESTDIR)$(pkgdatadir)/browser/dist/src/layer/tile/CanvasTileUtils.js;
+	cp -a dist/src/layer/tile/TileWorker.js $(DESTDIR)$(pkgdatadir)/browser/dist/src/layer/tile/TileWorker.js;
 if ENABLE_WASM
 	find $(DESTDIR)$(pkgdatadir)/browser/dist -type f ! -iname "*.png" -exec brotli --force {} \;
 endif