ENH: Use logical target names in Xcode projects

Previously we named Xcode targets using the output file name from one of the
configurations.  This is not very friendly, especially because it changes with
CMAKE_BUILD_TYPE.  Instead we should use the original logical target names for
the Xcode target names.  This is also consistent with the way the other IDE
generators work.

Source/cmGlobalXCodeGenerator.cxx

@@ -1888,8 +1888,8 @@ cmGlobalXCodeGenerator::CreateUtilityTarget(cmTarget& cmtarget)
   cmXCodeObject* dependencies = 
     this->CreateObject(cmXCodeObject::OBJECT_LIST);
   target->AddAttribute("dependencies", dependencies);
-  target->AddAttribute("name", this->CreateString(productName.c_str()));
-  target->AddAttribute("productName",this->CreateString(productName.c_str()));
+  target->AddAttribute("name", this->CreateString(cmtarget.GetName()));
+  target->AddAttribute("productName",this->CreateString(cmtarget.GetName()));
   target->SetTarget(&cmtarget);
 
   // Add source files without build rules for editing convenience.
@@ -1990,8 +1990,8 @@ cmGlobalXCodeGenerator::CreateXCodeTarget(cmTarget& cmtarget,
   cmXCodeObject* dependencies = 
     this->CreateObject(cmXCodeObject::OBJECT_LIST);
   target->AddAttribute("dependencies", dependencies);
-  target->AddAttribute("name", this->CreateString(productName.c_str()));
-  target->AddAttribute("productName",this->CreateString(productName.c_str()));
+  target->AddAttribute("name", this->CreateString(cmtarget.GetName()));
+  target->AddAttribute("productName",this->CreateString(cmtarget.GetName()));
 
   cmXCodeObject* fileRef = 
     this->CreateObject(cmXCodeObject::PBXFileReference);
@@ -2800,7 +2800,7 @@ cmGlobalXCodeGenerator::CreateXCodeDependHackTarget(
           universal += ".build/";
           universal += configName;
           universal += "/";
-          universal += t->GetFullName(configName);
+          universal += t->GetName();
           universal += ".build/Objects-normal/";
           for( std::vector<std::string>::iterator arch = 
                  this->Architectures.begin();
@@ -2953,23 +2953,7 @@ GetTargetObjectFileDirectories(cmTarget* target,
   dir += ".build/";
   dir += this->GetCMakeCFGInitDirectory();
   dir += "/";
-  if(target->GetType() != cmTarget::EXECUTABLE)
-    {
-    dir += "lib";
-    }
   dir += target->GetName();
-  if(target->GetType() == cmTarget::STATIC_LIBRARY)
-    {
-    dir += ".a";
-    }
-  if(target->GetType() == cmTarget::SHARED_LIBRARY)
-    {
-    dir += ".dylib";
-    }
-  if(target->GetType() == cmTarget::MODULE_LIBRARY)
-    {
-    dir += ".so";
-    }
   dir += ".build/Objects-normal/";
   std::string dirsave = dir;
   if(this->Architectures.size())