Revise C++ coding style using clang-format

Run the `Utilities/Scripts/clang-format.bash` script to update
all our C++ code to a new style defined by `.clang-format`.
Use `clang-format` version 3.8.

* If you reached this commit for a line in `git blame`, re-run the blame
  operation starting at the parent of this commit to see older history
  for the content.

* See the parent commit for instructions to rebase a change across this
  style transition commit.

Source/cmLocalXCodeGenerator.h

@@ -24,22 +24,20 @@ class cmLocalXCodeGenerator : public cmLocalGenerator
 {
 public:
   ///! Set cache only and recurse to false by default.
-  cmLocalXCodeGenerator(cmGlobalGenerator* gg,
-                        cmMakefile* mf);
+  cmLocalXCodeGenerator(cmGlobalGenerator* gg, cmMakefile* mf);
 
   virtual ~cmLocalXCodeGenerator();
-  virtual
-  std::string GetTargetDirectory(cmGeneratorTarget const* target) const;
+  virtual std::string GetTargetDirectory(
+    cmGeneratorTarget const* target) const;
   virtual void AppendFlagEscape(std::string& flags,
                                 const std::string& rawFlag);
   virtual void Generate();
   virtual void GenerateInstallRules();
   virtual void ComputeObjectFilenames(
-                        std::map<cmSourceFile const*, std::string>& mapping,
-                        cmGeneratorTarget const* gt = 0);
-private:
+    std::map<cmSourceFile const*, std::string>& mapping,
+    cmGeneratorTarget const* gt = 0);
 
+private:
 };
 
 #endif
-