Allow hsa_status_string when HSA is closed.

API is a stateless lookup of RO data and needed to interpret
hsa_init error codes.

Change-Id: If80cba2f697843d08e529da0f790acf3c37127a7


[ROCm/ROCR-Runtime commit: 22de0e7fb9]

projects/rocr-runtime/runtime/hsa-runtime/core/runtime/hsa.cpp

@@ -2573,7 +2573,6 @@ hsa_status_t hsa_executable_iterate_program_symbols(
 hsa_status_t hsa_status_string(
     hsa_status_t status,
     const char **status_string) {
-  IS_OPEN();
   IS_BAD_PTR(status_string);
   const size_t status_u = static_cast<size_t>(status);
   switch (status_u) {