[clang] Fix lifetimebound APINotes tests

The APINotes implementation upstream and downstream are not exactly the
same, this PR makes sure the lifetimebound type attribute for 'this'
object is deduplicated, and updates the test to respect versioned
attributes.

rdar://140295698

Author: Gabor Horvath

clang/test/APINotes/lifetimebound.cpp

@@ -11,6 +11,8 @@
 
 // CHECK-METHOD: CXXMethodDecl {{.+}} methodToAnnotate 
 // CHECK-METHOD-NEXT: ParmVarDecl {{.+}} p
+// CHECK-METHOD-NEXT: SwiftVersionedAdditionAttr
+// CHECK-METHOD-NEXT: LifetimeBoundAttr
 // CHECK-METHOD-NEXT: LifetimeBoundAttr
 
 // CHECK-METHOD-THIS: CXXMethodDecl {{.+}} annotateThis 'int *() {{\[\[}}clang::lifetimebound{{\]\]}}'