clang-format: Improve line breaks in @property.

Before:
  @property(nonatomic, assign,
            readonly) NSString *looooooooooooooooooooooooooooongName;

After:
  @property(nonatomic, assign, readonly)
      NSString *looooooooooooooooooooooooooooongName;

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@187577 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Format/TokenAnnotator.cpp b/lib/Format/TokenAnnotator.cpp
index b9d26ca..e0e24e2 100644
--- a/lib/Format/TokenAnnotator.cpp
+++ b/lib/Format/TokenAnnotator.cpp
@@ -1060,7 +1060,7 @@
   }
 
   // Breaking before a trailing 'const' or not-function-like annotation is bad.
-  if (Left.is(tok::r_paren) &&
+  if (Left.is(tok::r_paren) && Line.Type != LT_ObjCProperty &&
       (Right.is(tok::kw_const) || (Right.is(tok::identifier) && Right.Next &&
                                    Right.Next->isNot(tok::l_paren))))
     return 150;
@@ -1253,6 +1253,8 @@
     return true;
   if (Right.Type == TT_ObjCSelectorName)
     return true;
+  if (Left.is(tok::r_paren) && Line.Type == LT_ObjCProperty)
+    return true;
   if (Left.ClosesTemplateDeclaration)
     return true;
   if (Right.Type == TT_ConditionalExpr || Right.is(tok::question))