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

include/rocshmem/rocshmem.hpp

@@ -65,6 +65,17 @@ constexpr char VERSION[] = "3.0.0";
  */
 __host__ void rocshmem_init(MPI_Comm comm = MPI_COMM_WORLD);
 
+
+/**
+ * @brief Query rocSHMEM context from host API
+ *
+ * @param[out] ctx      Returns ROCSHMEM_CTX_DEFAULT device pointer that users 
+ *                      can query from one instance of rocshmem host library and
+ *                      use use later for dynamic module initialization in 
+ *                      kernel bitcode device library in the same application
+ */
+__host__ void * rocshmem_get_device_ctx();
+
 /**
  * @brief Initialize the rocSHMEM runtime and underlying transport layer
  *        with an attempt to enable the requested thread support.