[ci] Add a .sha256 release artifact for linux/osx

.travis.yml

@@ -47,7 +47,9 @@ deploy:
   api_key:
     secure: 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
   file_glob: true
-  file: sccache-$TRAVIS_TAG-$TARGET.tar.gz
+  file:
+    - sccache-$TRAVIS_TAG-$TARGET.tar.gz
+    - sccache-$TRAVIS_TAG-$TARGET.tar.gz.sha256
   on:
     condition: $DEPLOY = 1
     tags: true

scripts/prep_deploy.sh

@@ -5,5 +5,3 @@ mkdir $name
 cp target/$TARGET/release/sccache $name/
 cp README.md LICENSE $name/
 tar czvf $name.tar.gz $name
-chksum=($(shasum -ba 256 $name.tar.gz))
-echo "$chksum" > $name.tar.gz.sha256