Try to run custom build script to get caching on appveyor.
Try to run custom build script to get caching on appveyor.

mattico/rusoto,DualSpark/rust-aws,mthjones/rusoto,ford-prefect/rusoto,DualSpark/rust-aws,DualSpark/rust-aws,DualSpark/rusoto,noggleboggle/rusoto,mattico/rusoto,DualSpark/rusoto,SecurityInsanity/rusoto,mattico/rusoto,rusoto/rusoto,ford-prefect/rusoto,rusoto/rusoto,cmsd2/rusoto,SecurityInsanity/rusoto,DualSpark/rusoto,mthjones/rusoto,rusoto/rusoto