Add 'fine_gravel.json'

fine_gravel.json

@@ -0,0 +1,10 @@
+{
+    "type": "overpass",
+    "name": {
+        "en": "Fine Gravel"
+    },
+    "query": {
+        "6": "(node[surface=compacted];way[surface=compacted];node[surface=fine_gravel];way[surface=fine_gravel];)"
+    },
+    "info": "Compacted or fine gravel."
+}