BUG: Fix Xcode reference to Info.plist resource

- Generated Xcode projects for application bundles list the
    CMake-generated Info.plist input file as a resource.
  - The location of the input file was moved by a previous commit,
    but the reference to it as a resource file was not updated.
  - This change moves the file to CMakeFiles/<tgt>.dir/Info.plist
    to give it a more intuitive name in the Xcode project.
  - We also update the reference to point at the correct location.
  - See bug #7277.

Source/cmGlobalXCodeGenerator.cxx

@@ -1475,11 +1475,7 @@ void cmGlobalXCodeGenerator::CreateBuildSettings(cmTarget& target,
     if(target.GetPropertyAsBool("MACOSX_BUNDLE"))
       {
       productType = "com.apple.product-type.application";
-      std::string plist = this->CurrentMakefile->GetCurrentOutputDirectory();
+      std::string plist = this->ComputeInfoPListLocation(target);
-      plist += cmake::GetCMakeFilesDirectory();
-      plist += "/";
-      plist += target.GetName();
-      plist += "Info.plist";
       // Xcode will create the final version of Info.plist at build time,
       // so let it replace the executable name.  This avoids creating
       // a per-configuration Info.plist file.
@@ -2213,11 +2209,8 @@ void cmGlobalXCodeGenerator::CreateGroups(cmLocalGenerator* root,
       // MACOSX_BUNDLE file
       if(cmtarget.GetPropertyAsBool("MACOSX_BUNDLE"))
         {
-        std::string plistFile =
+        std::string plist = this->ComputeInfoPListLocation(cmtarget);
-          this->CurrentMakefile->GetCurrentOutputDirectory();
+        cmSourceFile* sf = mf->GetOrCreateSource(plist.c_str(), true);
-        plistFile += "/Info.plist";
-        cmSourceFile* sf =
-          this->CurrentMakefile->GetOrCreateSource(plistFile.c_str(), true);
         cmtarget.AddSourceFile(sf);
         }
 
@@ -2965,3 +2958,15 @@ void cmGlobalXCodeGenerator::AppendDefines(std::string& defs,
     defs += "'";
     }
 }
+
+//----------------------------------------------------------------------------
+std::string
+cmGlobalXCodeGenerator::ComputeInfoPListLocation(cmTarget& target)
+{
+  std::string plist = target.GetMakefile()->GetCurrentOutputDirectory();
+  plist += cmake::GetCMakeFilesDirectory();
+  plist += "/";
+  plist += target.GetName();
+  plist += ".dir/Info.plist";
+  return plist;
+}

Source/cmGlobalXCodeGenerator.h

@@ -103,6 +103,8 @@ private:
                             cmXCodeObject* frameworkBuildPhase,
                             cmTarget& cmtarget);
 
+  std::string ComputeInfoPListLocation(cmTarget& target);
+
   void AddCommandsToBuildPhase(cmXCodeObject* buildphase,
                                cmTarget& target,
                                std::vector<cmCustomCommand>