tools: Add a space between package version and LLVM_VERSION_INFO

This reads a little strangely. Add a space to clean it up.
Support: Inject LLVM_VERSION_INFO into the Support library

Mimic r116632 in passing LLVM_VERSION_INFO from the Makefile build
system to the build. This improves the -version output of tools that
use llvm::cl under the configure+make system.