Most CMake build systems put CMakeLists.txt files inside source directories where 
items need to get built. This change follows that convention by adding a new 
runtime/src/CMakeLists.txt file. An additional benefit is this helps logically 
seperate configuring with building as well. This change is mostly just copying and 
pasting the bottom half of runtime/CMakeLists.txt into runtime/src/CMakeLists.txt, 
but a few changes had to be made to get it to work. Most of those changes were to 
directory prefixes.

Differential Revision: http://reviews.llvm.org/D10344

llvm-svn: 239542

Remove runtime/CMakeLists.txt.old and runtime/src/CMakeLists.txt as
they no longer worked and were not being kept up to date.

Differential Revision: http://reviews.llvm.org/D9756

llvm-svn: 237615

llvm-svn: 225792

llvm-svn: 215093

Patch by Jack Howarth!

llvm-svn: 210025

This is not yet supported for production builds but can already produce working
binaries on OS X and Linux with clang and gcc.

The intention is to improve support to the point where it can integrate with
the LLVM runtime platform, cover all platforms, runtime/release build
configurations and run the tests.

Patch by Jack Howarth!

llvm-svn: 209994