[clang-format-vim] Support vim linked against py3
[clang-format-vim] Support vim linked against py3

clang-format.py previously only worked in vim compiled against python2.

This patch adds the necessary syntax changes to make this work with vim
linked against python3, which is now shipped by default for at least Ubuntu16 and Arch.

Differential Revision: https://reviews.llvm.org/D23319

Subscribers: cfe-commits


git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@280240 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang