Can't find declaration for hipLaunchKernel_spt

[joyongzhu]

I compile a test with "-fgpu-default-stream=per-thread"，but a compilation error occurred:

streamperthread/hipStreamPerThrdCompilerOptn.cc:50:17: error: Can't find declaration for hipLaunchKernel_spt
__global__ void DefltStrmPT_Square(int64_t *C_d, int64_t N) {
                ^
1 error generated when compiling for host.

I found that the compiler would require the code to use hipLaunchKernel_spt, and this function declared in spirv_spt.h，
should I manually include this header file into the source code of the test program?

[pvelesko]

Manually including it for now should work, I'll work on fixing this issue in the meantime

[pvelesko]

@joyongzhu please test #916

don't forget to git submodule update after you checkout the branch

[joyongzhu]

it work ~~~ thanks ~~~