Fixes bug 20587 - Add K&R break before braces style
Summary:
http://llvm.org/bugs/show_bug.cgi?id=20587
Added K&R style. It could be enabled by the following option:
```
BreakBeforeBraces: KernighanRitchie
```
This style is like `Attach`, but break *only* before function
declarations.
As I can see, no additional logic required to support this style, any
style different from other styles automagically satisfies K&R.
Reviewers: djasper
Reviewed By: djasper
Subscribers: cfe-commits, klimek
Differential Revision: http://reviews.llvm.org/D4837
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215354
91177308-0d34-0410-b5e6-
96231b3b80d8