clang-format: Keep more trailing annotations on the same line.

More precisely keep all short annotations (<10 characters) on the same
line if possible. Previously, clang-format would only prefer to do so
for "const", "override" and "final". However, it seems to be generally
preferable, especially because some codebases have to wrap those in
macros for backwards compatibility.

Before:
  void someLongFunction(int someLongParameter)
      OVERRIDE {}

After:
  void someLongFunction(
      int someLongParameter) OVERRIDE {}

This fixes llvm.org/PR19363.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@205845 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Allow breaking between trailing annotations in more cases.

Before:
  void aaaaaaaaaaaaaa(aaaaaaaa aaa) override AAAAAAAAAAAAAAAAAAAAAAAA(
      aaaaaaaaaaaaaaa);

After:
  void aaaaaaaaaaaaaa(aaaaaaaa aaa) override
      AAAAAAAAAAAAAAAAAAAAAAAA(aaaaaaaaaaaaaaa);

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@205846 91177308-0d34-0410-b5e6-96231b3b80d8