Revert "CMake: Update to use standard CMake dependency tracking facilities instead"

This reverts commit r113631

Conflicts:

	CMakeLists.txt
	lib/CodeGen/CMakeLists.txt

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@113817 91177308-0d34-0410-b5e6-96231b3b80d8
21 files changed