add license to subdirectory

scripts/formulas/msdf-atlas-gen.sh

@@ -150,7 +150,8 @@ function copy() {
         cd ../..
         dest_include=$1/include
         mkdir -p $dest_include
-        cp LICENSE.txt $dest_include/
+        mkdir -p $1/license
+        cp LICENSE.txt $1/license/
         cp ./*.h $dest_include/
         cp -r artery-font-format $dest_include/
         cp -r msdfgen $dest_include/