Enable artifact uploads for windows builds

Fixes rust-lang#1210

Author: bjorn3

.github/workflows/main.yml

@@ -152,11 +152,12 @@ jobs:
 
         ./y.exe build
 
-    #- name: Package prebuilt cg_clif
-    #  run: tar cvfJ cg_clif.tar.xz build
+    - name: Package prebuilt cg_clif
+      # don't use compression as xzip isn't supported by tar on windows and bzip2 hangs
+      run: tar cvf cg_clif.tar build
 
-    #- name: Upload prebuilt cg_clif
-    #  uses: actions/upload-artifact@v2
-    #  with:
-    #    name: cg_clif-${{ runner.os }}
-    #    path: cg_clif.tar.xz
+    - name: Upload prebuilt cg_clif
+      uses: actions/upload-artifact@v2
+      with:
+        name: cg_clif-${{ runner.os }}
+        path: cg_clif.tar