[ci] Add text file with GitHub commit hash to nightly builds (#5082)

* Add text file with GitHub commit hash to nightly builds

* Update .vsts-ci.yml

* Revert "Update .vsts-ci.yml"

This reverts commit 75c41893982ab34ef9d7044d8dbf434be184c175.

.vsts-ci.yml

@@ -67,6 +67,9 @@ jobs:
       echo "##vso[task.setvariable variable=LD_LIBRARY_PATH]$LD_LIBRARY_PATH"
       echo "##vso[task.setvariable variable=OPENCL_VENDOR_PATH]$AMDAPPSDK_PATH/etc/OpenCL/vendors"
     displayName: 'Set variables'
+  - script: |
+      echo '$(Build.SourceVersion)' > '$(Build.ArtifactStagingDirectory)/commit.txt'
+    displayName: 'Add commit hash to artifacts archive'
   - bash: $(Build.SourcesDirectory)/.ci/setup.sh
     displayName: Setup
   - bash: $(Build.SourcesDirectory)/.ci/test.sh