Let clang-format break after a function's return type.

Before:
TypeSpecDecl *TypeSpecDecl::Create(ASTContext &C, DeclContext *DC,
                                   SourceLocation L, IdentifierInfo *II,
                                   Type *T) {}

After:
TypeSpecDecl *
TypeSpecDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L,
                     IdentifierInfo *II, Type *T) {}

This fixes llvm.org/PR14717.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173688 91177308-0d34-0410-b5e6-96231b3b80d8
Note that SrcMgr::SLocEntry's are POD-like, so SmallVector can do a
better job with them. Shaves off 0.7% of -fparse-only time for a
modules test case. Sure makes you wonder...


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173689 91177308-0d34-0410-b5e6-96231b3b80d8
Don't put a function's return type on its own line in Google style.

This would be against the style guide:
http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml?showone=Function_Declarations_and_Definitions#Function_Declarations_and_Definitions

Not sure what to do as a last resort if the function signature does not
fit onto a single line in Google style ..

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173690 91177308-0d34-0410-b5e6-96231b3b80d8