Add test case for <rdar://problem/8891119>. In

earlier revisions Clang was incorrectly warning
about an incomplete @implementation when a property
was getting synthesized.  This got fixed somewhere
down the line.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@123939 91177308-0d34-0410-b5e6-96231b3b80d8

test/SemaObjC/category-1.m

@@ -78,3 +78,20 @@
 // <rdar://problem/7680391> - Handle nameless categories with no name that refer
 // to an undefined class
 @interface RDar7680391 () @end // expected-error{{cannot find interface declaration}}
+
+// <rdar://problem/8891119> - Handle @synthesize being used in conjunction
+// with explicitly declared accessor.
+@interface RDar8891119 {
+  id _name;
+}
+@end
+@interface RDar8891119 ()
+- (id)name;
+@end
+@interface RDar8891119 ()
+@property (copy) id name;
+@end
+@implementation RDar8891119
+@synthesize name = _name;
+@end
+