6740930: G1: compilation failure with latest gcc

Summary: Include DB fix to resolve a compilation issue with the latest gcc.
Reviewed-by: iveresov, ysr

src/share/vm/gc_implementation/includeDB_gc_g1

@@ -266,7 +266,7 @@ heapRegion.cpp                          oop.inline.hpp
 
 heapRegion.hpp                          space.hpp
 heapRegion.hpp                          spaceDecorator.hpp
-heapRegion.hpp                          g1BlockOffsetTable.hpp
+heapRegion.hpp                          g1BlockOffsetTable.inline.hpp
 heapRegion.hpp                          watermark.hpp
 heapRegion.hpp				g1_specialized_oop_closures.hpp
 heapRegion.hpp				survRateGroup.hpp