message: Fix build URL in new LLDB website
  Summary:
  After the LLDB website was migrated to be generated by Sphinx the build.html file lives in another location.
  See
  Reviewers: teemperor
  Subscribers: lldb-commits
  Tags: #lldb
diff: @@ -15,4 +15,4 @@ LLDB branch, according to the algorithm in scripts/Xcode/repo.py.
  For instructions to build LLDB on Linux, or more details about supported
  compiler versions, other dependencies, and build flags, see:
  - http://lldb.llvm.org/build.html
  + https://lldb.llvm.org/resources/build.html
  