Fix: Export rsmi_init shim with default visibility to be seen by PyTorch

projects/rccl/src/misc/smi_shim.cc

@@ -4,6 +4,7 @@ extern "C" {
     // Dummy implementation of rsmi_init to satisfy linker dependencies
     // when the real ROCm SMI library is broken or causes Bus Errors (gfx1151).
     // Returns 0 (RSMI_STATUS_SUCCESS).
+    __attribute__((visibility("default")))
     int rsmi_init(uint64_t flags) {
         return 0;
     }