Upgrade bazel to 1.2.0. (pytorch#30885)

Summary:
Companion diff for pytorch/xla#1464. Should land only after the pytorch/xla PR is in.
Pull Request resolved: pytorch#30885

Differential Revision: D18866835

Pulled By: ailzhang

fbshipit-source-id: 51f4d2770f8ef873a659579ddd81a42957ffb885

Author: Ailing Zhang

.jenkins/pytorch/build.sh

@@ -256,7 +256,7 @@ if [[ "${BUILD_ENVIRONMENT}" == *xla* ]]; then
   # Bazel dependencies
   sudo apt-get -qq install pkg-config zip zlib1g-dev unzip
   # XLA build requires Bazel
-  wget https://github.com/bazelbuild/bazel/releases/download/0.24.1/bazel-0.24.1-installer-linux-x86_64.sh
+  wget https://github.com/bazelbuild/bazel/releases/download/1.1.0/bazel-1.1.0-installer-linux-x86_64.sh
   chmod +x bazel-*.sh
   sudo ./bazel-*.sh
   BAZEL="$(which bazel)"