Update buildbot/configure.py

[dyniols]

This PR updates cmake configuration option based on this warning.

-- Detecting CXX compile features - done
CMake Warning at CMakeLists.txt:198 (message):
  Using LLVM_ENABLE_PROJECTS=compiler-rt is deprecated now, and will become a
  fatal error in a future release.  Please use
  -DLLVM_ENABLE_RUNTIMES=compiler-rt or see the instructions at
  https://compiler-rt.llvm.org/ for building the runtimes.

Not sure if it's right solution but with review I am waiting for suggestions.

[sarnex]

@dyniols It looks like configure is failing on both platforms with this change, can you take a look to see if you can figure out the cause?

[dyniols]

@dyniols It looks like configure is failing on both platforms with this change, can you take a look to see if you can figure out the cause?

Yes I will take a look.