Improve debug print messages.

- Remove "call-to-call" for hipStreamCreate and hipEventCreate.
  These now call an internal functions rather than calling through
  hipStreamCreateWithFalgs and hipEventCreateWithFlags.

- Add HIP_INIT_API for more functions so they trace correctly.

- Use stream#DEVICE.STREAMID in debug messages via new specialization in
  tace_helper.

util/vim/hip.vim

@@ -150,6 +150,7 @@ syn keyword hipFunctionName hipMemset2D
 syn keyword hipFunctionName hipMemset3D 
 syn keyword hipFunctionName hipSetDevice 
 syn keyword hipFunctionName hipSetupArgument 
+syn keyword hipFunctionName hipStreamCreateWithFlags
 syn keyword hipFunctionName hipStreamCreate 
 syn keyword hipFunctionName hipStreamDestroy 
 syn keyword hipFunctionName hipStreamQuery