Lex: clang-format HeaderMap.h, NFC
Lex: clang-format HeaderMap.h, NFC

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@261443 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit d9d154cc11d04d1b6060592093208df8455e6562)

apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang