[general] moving ios and android project under ./platform folder

vendor/wagyu.cmake

@@ -0,0 +1,21 @@
+if(TARGET mbgl-vendor-wagyu)
+    return()
+endif()
+
+add_library(
+    mbgl-vendor-wagyu INTERFACE
+)
+
+target_include_directories(
+    mbgl-vendor-wagyu SYSTEM
+    INTERFACE ${CMAKE_CURRENT_LIST_DIR}/wagyu/include
+)
+
+set_target_properties(
+    mbgl-vendor-wagyu
+    PROPERTIES
+        INTERFACE_MAPBOX_NAME "wagyu"
+        INTERFACE_MAPBOX_URL "https://github.com/mapbox/wagyu.git"
+        INTERFACE_MAPBOX_AUTHOR "Angus Johnson and Mapbox"
+        INTERFACE_MAPBOX_LICENSE ${CMAKE_CURRENT_LIST_DIR}/wagyu/LICENSE
+)