NCCL 2.4.6-1

Added detection of IBM/Power NVLink bridge device.
    Add NUMA support to PCI distance calculations.
    Added NCCL_IGNORE_CPU_AFFINITY env var.
    Fix memory leaks; GithubIssue#180
    Compiler warning fix; GithubIssue#178
    Replace non-standard variable length arrays. GithubIssue#171
    Fix Tree+Shared Memory crash. GithubPR#185
    Fix LL cleanup hang during long running DL jobs.
    Fix NCCL_RINGS environment variable handling.
    Added extra checks to catch repeat calls to ncclCommDestroy() GithubIssue#191
    Improve bootstrap socket connection reliability at scale.
    Fix hostname hashing issue. GithubIssue#187
    Code cleanup to rename all non device files from *.cu to *.cc


[ROCm/rccl commit: f40ce73e89]

projects/rccl/src/include/param.h

@@ -1,5 +1,5 @@
 /*************************************************************************
- * Copyright (c) 2017-2018, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2017-2019, NVIDIA CORPORATION. All rights reserved.
  *
  * See LICENSE.txt for license information
  ************************************************************************/
@@ -36,7 +36,6 @@ static void setEnvFile(const char* fileName) {
     s++;
     strncpy(envValue, line+s, 1024);
     setenv(envVar, envValue, 0);
-    char *str = getenv(envVar);
   }
   if (line) free(line);
   fclose(file);