Update graphics-base.h makefile.

Bug: 33541458
Test: pass
Change-Id: I9f095596edf855587a37cc57ad19bd19902684c5
diff --git a/include/system/graphics-base.h b/include/system/graphics-base.h
index 2aac2d8..0366592 100644
--- a/include/system/graphics-base.h
+++ b/include/system/graphics-base.h
@@ -1,5 +1,6 @@
 // This file is autogenerated by hidl-gen. Do not edit manually.
 // Source: android.hardware.graphics.common@1.0
+// Root: android.hardware:hardware/interfaces
 
 #ifndef HIDL_GENERATED_ANDROID_HARDWARE_GRAPHICS_COMMON_V1_0_EXPORTED_CONSTANTS_H_
 #define HIDL_GENERATED_ANDROID_HARDWARE_GRAPHICS_COMMON_V1_0_EXPORTED_CONSTANTS_H_