[WIP] add hip-sys

[chriscai-amd]

cargo build --package hip-sys

   Compiling hip-sys v0.0.0 (/home/chcai/monarch/hip-sys)
error[E0412]: cannot find type `ihipStream_t` in this scope
  --> hip-sys/src/lib.rs:21:28
   |
21 | unsafe impl ExternType for ihipStream_t {
   |                            ^^^^^^^^^^^^ not found in this scope

[chriscai-amd]

hipStream_t should be included here @mreso