USD: Install USD library via install_deps.sh

This commit adds the download, extract, patch, build, and install of the
Universal Scene Description (USD) library to the `install_deps.sh`
script.

Reviewed By: mont29, LazyDodo

Differential Revision: https://developer.blender.org/D6478

source/creator/CMakeLists.txt

@@ -1058,7 +1058,7 @@ setup_liblinks(blender)
 if(WITH_USD)
   add_definitions(-DWITH_USD)
   install(DIRECTORY
-    ${LIBDIR}/usd/lib/usd
+    ${USD_LIBRARY_DIR}/usd
     DESTINATION "${TARGETDIR_VER}/datafiles"
   )
 endif()