Refactor compiled_method.h .

Move LinkerPatch to compiler/linker/linker_patch.h .
Move SrcMapElem to compiler/debug/src_map_elem.h .
Introduce compiled_method-inl.h to reduce the number
of `#include`s in compiled_method.h .

Test: m test-art-host-gtest
Test: testrunner.py --host
Change-Id: Id211cdf94a63ad265bf4709f1a5e06dffbe30f64
diff --git a/compiler/optimizing/code_generator.h b/compiler/optimizing/code_generator.h
index 30c2b52..4b4abdf 100644
--- a/compiler/optimizing/code_generator.h
+++ b/compiler/optimizing/code_generator.h
@@ -61,9 +61,12 @@
 class CodeGenerator;
 class CompilerDriver;
 class CompilerOptions;
-class LinkerPatch;
 class ParallelMoveResolver;
 
+namespace linker {
+class LinkerPatch;
+}  // namespace linker
+
 class CodeAllocator {
  public:
   CodeAllocator() {}
@@ -205,7 +208,7 @@
 
   virtual void Initialize() = 0;
   virtual void Finalize(CodeAllocator* allocator);
-  virtual void EmitLinkerPatches(ArenaVector<LinkerPatch>* linker_patches);
+  virtual void EmitLinkerPatches(ArenaVector<linker::LinkerPatch>* linker_patches);
   virtual void GenerateFrameEntry() = 0;
   virtual void GenerateFrameExit() = 0;
   virtual void Bind(HBasicBlock* block) = 0;