clang-format: Leave 2 empty lines in Google's JavaScript style.

As per the style guide, two lines are required between top-level
elements.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@199660 91177308-0d34-0410-b5e6-96231b3b80d8
HasFunctionProto is a more strict version of FunctionLike. Since attribute subjects are inclusive (passing a single subject test means no subject-related diagnostic will fire), these two subjects should not be combined.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@199662 91177308-0d34-0410-b5e6-96231b3b80d8
Making some minor improvements to r199626.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@199663 91177308-0d34-0410-b5e6-96231b3b80d8