Create stub GrAuditTrail class

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1572553002

Review URL: https://codereview.chromium.org/1572553002
diff --git a/gyp/gpu.gypi b/gyp/gpu.gypi
index a760580..c956863 100644
--- a/gyp/gpu.gypi
+++ b/gyp/gpu.gypi
@@ -55,8 +55,10 @@
       '<(skia_include_path)/gpu/gl/GrGLTypes.h',
 
       # Private includes
+      '<(skia_include_path)/private/GrAuditTrail.h',
       '<(skia_include_path)/private/GrSingleOwner.h',
 
+      '<(skia_src_path)/gpu/GrAuditTrail.cpp',
       '<(skia_src_path)/gpu/GrAutoLocaleSetter.h',
       '<(skia_src_path)/gpu/GrAllocator.h',
       '<(skia_src_path)/gpu/GrBatchAtlas.cpp',