Add C++ icon (#1038)

* Add C++ icon

* Rename cpp.svg to cplusplus.svg

* Updated the attributes to match the icon name.

* Fix artifacts in C++ SVG

_data/simple-icons.json

@@ -405,6 +405,11 @@
             "hex": "F43059",
             "source": "http://csswizardry.com"
         },
+        {
+            "title": "C++",
+            "hex": "00599C",
+            "source": "https://github.com/isocpp/logos"
+        },
         {
             "title": "D3.js",
             "hex": "F9A03C",

icons/cplusplus.svg

@@ -0,0 +1 @@
+<svg aria-labelledby="simpleicons-cplusplus-icon" role="img" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><title id="simpleicons-cplusplus-icon">C++ icon</title><path d="M22.393 6c-.167-.29-.398-.543-.652-.69L12.925.22c-.508-.293-1.339-.293-1.847 0L2.26 5.31c-.508.293-.923 1.013-.923 1.6v10.18c0 .294.104.62.271.91.167.29.398.543.652.689l8.816 5.091c.508.293 1.339.293 1.847 0l8.816-5.091c.254-.146.485-.399.652-.689s.271-.616.271-.91V6.91c.002-.294-.102-.62-.269-.91zM12 19.109c-3.92 0-7.109-3.189-7.109-7.109S8.08 4.891 12 4.891a7.133 7.133 0 0 1 6.156 3.552l-3.076 1.781A3.567 3.567 0 0 0 12 8.445c-1.96 0-3.554 1.595-3.554 3.555S10.04 15.555 12 15.555a3.57 3.57 0 0 0 3.08-1.778l3.077 1.78A7.135 7.135 0 0 1 12 19.109zm7.109-6.714h-.79v.79h-.79v-.79h-.79v-.79h.79v-.79h.79v.79h.79v.79zm2.962 0h-.79v.79h-.79v-.79h-.789v-.79h.789v-.79h.79v.79h.79v.79z"/></svg>