6714428: 'os.name' system property shows wrong value on 64-bit Windows XP
Summary: update to detect the correct os.name for 64-bit XP
Reviewed-by: darcy
^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/