Doxygenize the documentation comments

src/IceCompiler.h

Index: src/IceCompiler.h
diff --git a/src/IceCompiler.h b/src/IceCompiler.h
index 460c3274afeeb5bd6522ea1f1fd1fafaeb72eda1..a4499c5f7cbc800676972afe042df7e6b7b5c1b9 100644
--- a/src/IceCompiler.h
+++ b/src/IceCompiler.h
@@ -24,7 +24,7 @@ namespace Ice {
 
 class ClFlagsExtra;
 
-// A compiler driver. It may be called to handle a single compile request.
+/// A compiler driver. It may be called to handle a single compile request.
 class Compiler {
   Compiler(const Compiler &) = delete;
   Compiler &operator=(const Compiler &) = delete;
@@ -32,8 +32,8 @@ class Compiler {
 public:
   Compiler() = default;
 
-  // Run the compiler with the given GlobalContext for compilation
-  // state.  Upon error, the Context's error status will be set.
+  /// Run the compiler with the given GlobalContext for compilation
+  /// state.  Upon error, the Context's error status will be set.
   void run(const ClFlagsExtra &ExtraFlags, GlobalContext &Ctx,
            std::unique_ptr<llvm::DataStreamer> &&InputStream);
 };