[Index] Avoid passing composition SourceLoc in reportRelatedTypeRef

We want to use the SourceLoc of each individual member of the
composition.

Author: hamishknight

lib/Index/Index.cpp

@@ -1486,9 +1486,8 @@ bool IndexSwiftASTWalker::reportInheritedTypeRefs(InheritedTypes Inherited,
 bool IndexSwiftASTWalker::reportRelatedTypeRef(const TypeLoc &Ty, SymbolRoleSet Relations,
                                                Decl *Related, bool Implicit, SourceLoc Loc) {
   if (auto *composite = llvm::dyn_cast_or_null<CompositionTypeRepr>(Ty.getTypeRepr())) {
-    SourceLoc IdLoc = Loc.isValid() ? Loc : composite->getSourceLoc();
     for (auto *Type : composite->getTypes()) {
-      if (!reportRelatedTypeRef(Type, Relations, Related, /*isImplicit=*/Implicit, IdLoc))
+      if (!reportRelatedTypeRef(Type, Relations, Related, /*isImplicit=*/Implicit, Loc))
         return false;
     }
 

test/Index/conformances.swift

@@ -81,7 +81,7 @@ class SubMultiConf: BaseMultiConf,P2,P1,P3 { // CHECK: [[@LINE]]:7 | class/Swift
 
 class CompositionType: BaseMultiConf & P1 { // CHECK: [[@LINE]]:7 | class/Swift | CompositionType | [[CompositionType_USR:.*]] | Def
   // CHECK: [[@LINE-1]]:24 | class/Swift | BaseMultiConf | [[BaseMultiConf_USR]] | Ref,RelBase | rel: 1
-  // CHECK: [[@LINE-2]]:24 | protocol/Swift | P1 | [[P1_USR]] | Ref,RelBase | rel: 1
+  // CHECK: [[@LINE-2]]:40 | protocol/Swift | P1 | [[P1_USR]] | Ref,RelBase | rel: 1
   func foo() {}
 }