Upload 'wind_generator.svg' to 'power-plants'

Add 'wind_generator.svg' from https://github.com/gravitystorm/openstreetmap-carto/blob/master/symbols/generator_wind.svg

generator_wind.svg

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   id="svg2"
+   viewBox="0 0 14 14"
+   height="14"
+   width="14"
+   version="1.1">
+  <metadata
+     id="metadata8">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs6" />
+  <rect
+     style="fill:none;stroke:none;visibility:hidden"
+     id="canvas"
+     y="0"
+     x="0"
+     height="14"
+     width="14" />
+  <path
+     id="power-wind"
+     d="M 12 0 C 9.5776054 1.453437 8.7344237 2.0062586 7.5644531 3.0820312 A 2 2 0 0 1 8.9179688 4.4355469 C 10.000256 3.2607453 10.536088 2.4398548 12 0 z M 3.71875 3.6542969 C 2.7974228 3.6764675 1.760434 3.7900279 0 4 C 2.6016345 5.0128073 3.5611756 5.3446455 5.0976562 5.609375 A 2 2 0 0 1 5 5 A 2 2 0 0 1 5.4589844 3.7265625 C 4.8432712 3.6727363 4.2823162 3.6407354 3.71875 3.6542969 z M 7 4 A 1 1 0 0 0 6 5 A 1 1 0 0 0 7 6 A 1 1 0 0 0 8 5 A 1 1 0 0 0 7 4 z M 8.9199219 5.5585938 A 2 2 0 0 1 7 7 A 2 2 0 0 1 6.2871094 6.8652344 L 5.828125 13 L 4 13 L 4 14 L 10 14 L 10 13 L 8 13 L 7.6679688 7.0097656 C 8.8055629 8.0515261 9.5932978 8.5527989 12 10 C 10.537555 7.5572175 10.002684 6.7357296 8.9199219 5.5585938 z "
+     style="fill:#000000;fill-opacity:1;stroke:none" />
+</svg>