OS X: Shorten CFBundleExecutable to file name only

Shorten the CFBundleExecutable in the PList file of Bundles to
the file name only as it is done for Frameworks, too.

Signed-off-by: Gregor Jasny <gjasny@googlemail.com>

Source/cmOSXBundleGenerator.cxx

@@ -181,8 +181,9 @@ void cmOSXBundleGenerator::CreateCFBundle(const std::string& targetName,
   std::string plist = root + "/" +
     this->GT->Target->GetCFBundleDirectory(this->ConfigName, true);
   plist += "/Info.plist";
+  std::string name = cmSystemTools::GetFilenameName(targetName);
   this->LocalGenerator->GenerateAppleInfoPList(this->GT->Target,
-                                               targetName,
+                                               name,
                                                plist.c_str());
   this->Makefile->AddCMakeOutputFile(plist);
 }