Always format entire macro definitions.

Thereby, the macro is consistently formatted (including the trailing
escaped newlines) even if clang-format is invoked only on single lines
of the macro.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181590 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed