Move CodeCompletionBuilder's chunk adding methods out of line.

This makes sense because chunk's ctor is also out of line and simplifies considerably
when inlined with a constant parameter. Shrinks clang on i386-linux-Release+Asserts by 65k.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@153446 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed