Change preview channel to rel-1.0.0

Author: John Kordich

.travis.yml

@@ -8,7 +8,7 @@ before_install:
   - git submodule update --init
   - sudo apt-get install -y -qq curl make g++ cmake libc6 libgcc1 libstdc++6 libcurl3 libgssapi-krb5-2 libicu52 liblldb-3.6 liblttng-ust0 libssl1.0.0 libunwind8 libuuid1 zlib1g clang-3.5
   - curl -s "https://raw.githubusercontent.com/dotnet/cli/rel/1.0.0/scripts/obtain/dotnet-install.sh" -o dotnet-install.sh
-  - bash ./dotnet-install.sh -c preview -v latest
+  - bash ./dotnet-install.sh -c rel-1.0.0 -v latest
 script:
   - ./build.sh
   - ./test.sh