Collect gcnArch and hipDeviceArch_t in XML (#252)

[ROCm/rccl commit: 7e3d8a31cc]

projects/rccl/src/graph/xml.h

@@ -37,7 +37,7 @@ struct ncclXml {
 };
 
 /* File functions */
-#define NCCL_TOPO_XML_VERSION 1
+#define NCCL_TOPO_XML_VERSION 2
 ncclResult_t ncclTopoGetXmlFromFile(const char* xmlTopoFile, struct ncclXml* xml);
 ncclResult_t ncclTopoDumpXmlToFile(const char* xmlTopoFile, struct ncclXml* xml);
 #define NCCL_GRAPH_XML_VERSION 1
@@ -235,4 +235,10 @@ static ncclResult_t kvConvertToStr(int value, const char** str, struct kvDict* d
   return ncclInternalError;
 }
 
+typedef union {
+  hipDeviceArch_t arch;
+  int value;
+  static_assert(sizeof(hipDeviceArch_t) == sizeof(int),
+      "value must be the same size of hipDeviceArch_t.");
+} rcclHipDeviceArch_t;
 #endif