[include-fixer] Add an options allow moving the cursor to #include line in vim

after inserting a missing header.

Summary:

A small improvement: Don't print newline character at the end of message, so
that users don't have to type ENTER manually after running the python script.

Reviewers: bkramer

Subscribers: djasper, klimek, cfe-commits

Differential Revision: https://reviews.llvm.org/D22351

llvm-svn: 275781