[clang-include-fixer] Added Vim integration for clang-include-fixer.

Description

[clang-include-fixer] Added Vim integration for clang-include-fixer.

Summary: [clang-include-fixer] Added Vim integration for clang-include-fixer.

Reviewers: hokein, bkramer

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D20329