Append CMake build flags to the end of a compile line
completed by: gcking
This is a follow-on task to http://www.google-melange.com/gci/task/view/google/gci2012/7984228
Instead of having environment variables get appended to the beginning or middle of a flags list, make them get added to the end. It's often a case when compiling that you need to override a flag or path getting set, so we need the ability to both prepend and affix flags to the end of a compilation/linker line.
Provide a patch and output log showing it works.