Bump required bazel version to 1.0.0rc2
Bump required bazel version to 1.0.0rc2

Change-Id: I054b83b3df7d9fda5539f9e6ab43da6d2e665715

GerritCodeReview/plugins_reviewers,GerritCodeReview/plugins_reviewers,GerritCodeReview/plugins_reviewers