Import mapbox::variant in lieu of c++17 variant
See http://github.com/mapbox/variant.
Change-Id: Idbb2af80f0478188b652858d08817a5450630f0f
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/mapbox/LICENSE b/mapbox/LICENSE
new file mode 100644
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--- /dev/null
+++ b/mapbox/LICENSE
@@ -0,0 +1,25 @@
+Copyright (c) MapBox
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+- Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright notice, this
+ list of conditions and the following disclaimer in the documentation and/or
+ other materials provided with the distribution.
+- Neither the name "MapBox" nor the names of its contributors may be
+ used to endorse or promote products derived from this software without
+ specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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