Add host API to query Device side context detail (#183)

* API support for enabling rocshmem bitcode integration

* move implementation to along with host side APIs

src/rocshmem.cpp

@@ -263,6 +263,14 @@ rocshmem_ctx_t ROCSHMEM_HOST_CTX_DEFAULT;
   return ROCSHMEM_SUCCESS;
 }
 
+__host__ void * rocshmem_get_device_ctx() {
+  void *ctx = nullptr;
+
+  CHECK_HIP(hipMemcpyFromSymbol(&ctx, HIP_SYMBOL(ROCSHMEM_CTX_DEFAULT),
+                             sizeof(rocshmem_ctx_t)));
+  return ctx;
+}
+
 [[maybe_unused]] __host__ int rocshmem_my_pe() {
   if (backend != nullptr) {
     return backend->getMyPE();