6740930: G1: compilation failure with latest gcc
Summary: Include DB fix to resolve a compilation issue with the latest gcc.
Reviewed-by: iveresov, ysr
^build/
^dist/
^nbproject/private/
^src/share/tools/hsdis/bin/
^src/share/tools/IdealGraphVisualizer/[a-zA-Z0-9]*/build/
^src/share/tools/IdealGraphVisualizer/build/
^src/share/tools/IdealGraphVisualizer/dist/