add GNU Privacy Guard (#1632)

fixes #1631

_data/simple-icons.json

@@ -1140,6 +1140,11 @@
             "hex": "A42E2B",
             "source": "https://gnu.org"
         },
+        {
+            "title": "GNU Privacy Guard",
+            "hex": "0093DD",
+            "source": "https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=tree;f=artwork/icons"
+        },
         {
             "title": "GNU social",
             "hex": "A22430",

icons/gnuprivacyguard.svg

@@ -0,0 +1 @@
+<svg role="img" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><title>GNU Privacy Guard icon</title><path d="M2.968 11.583h1.274v-3.82A7.76 7.76 0 0 1 12.005 0a7.76 7.76 0 0 1 7.762 7.763v3.783c-.018.01-.037.028-.056.037l-.01.01-.008.009h-.01l-.01.01-.009.009H19.636l-.018.018h-.02l-.018.01h-.01l-.009.01-.009.009h-.01l-.009.009-.009.01-.01.009-.009.009-.028.019-.019.01-.028.018-.018.01-.02.009-.027.018-.019.01-.01.009-.027.019-.02.01-.046.027-.019.01-.018.009-.02.01h-.008l-.057.027h-.019c-.018.01-.037.02-.065.038h-.01l-.009.01-.028.018-.018.01-.029.018-.018.01h-.01l-.028.018-.018.01-.02.009c-.018.01-.046.019-.065.028l-.018.01-.02.009-.037.018-.037.02-.047.018-.047.019-.019.009-.037.019-.019.01c-1.545.739-4.017 1.516-8.708 1.853-3.362.244-5.403 1.723-6.724 3.502zm4.842 0h8.371v-3.82a4.184 4.184 0 0 0-4.186-4.186A4.184 4.184 0 0 0 7.81 7.763zm13.222 1.461V24H5.572c1.704-.946 2.968-.852 5.075-.787 2.865.094 6.03-1.105 7.585-2.696 1.554-1.592-.14-.375-1.901.074-1.76.45-5.17.497-7.454-.103 7.173.094 9.973-2.219 11.555-4.307 1.583-2.079-.683-.365-2.153.356-1.47.72-4.036 1.227-6.864.852 4.27-.01 7.52-2.144 9.607-4.345z"/></svg>