tell the ModelGeneeratorFactor if we have llvm

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/feature-llvm@1066 c0027639-9190-0b57-01eb-f09a03790dae
tell the ModelGeneeratorFactor if we have llvm

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/feature-llvm@1067 c0027639-9190-0b57-01eb-f09a03790dae
cleaned up LLVM build, fixed some bad const casts

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/feature-llvm@1068 c0027639-9190-0b57-01eb-f09a03790dae