cmGeneratorTarget: Add API for globally visible IMPORTED

Source/cmGeneratorTarget.cxx

@@ -856,6 +856,11 @@ bool cmGeneratorTarget::IsImported() const
   return this->Target->IsImported();
 }
 
+bool cmGeneratorTarget::IsImportedGloballyVisible() const
+{
+  return this->Target->IsImportedGloballyVisible();
+}
+
 //----------------------------------------------------------------------------
 const char* cmGeneratorTarget::GetLocationForBuild() const
 {

Source/cmGeneratorTarget.h

@@ -31,6 +31,7 @@ public:
   cmLocalGenerator* GetLocalGenerator() const;
 
   bool IsImported() const;
+  bool IsImportedGloballyVisible() const;
   const char *GetLocation(const std::string& config) const;
 
   std::vector<cmCustomCommand> const &GetPreBuildCommands() const;