Revert "Raising minimum required CMake version to 2.8.12.2."

This reverts commit add62ac537d8249fa2161405066e318ca80e199d.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228616 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed