add stub for : IsValidEnhMetaRecord and IsValidEnhMetaRecordOffExt, I have not search...

add stub for : IsValidEnhMetaRecord and IsValidEnhMetaRecordOffExt, I have not search after any info about thuse api
follow api need have some part done in user mode : OffsetRgn, GetTextCharsetInfo, IntersectClipRect, OffsetClipRgn.
Implement partly NamedEscape we need metadc support to finish full implement
follow api have been move from redirect to smaller code into hacks.c for they are ros own syscall and
does not exists in windows, GetStretchBltMode, GetTextAlign, GetTextColor, MoveToEx, OffsetViewportOrgEx, OffsetWindowOrgEx.
redirect HT_Get8BPPMaskPalette, HT_Get8BPPFormatPalette, GetSystemPaletteUse to win32k

svn path=/trunk/; revision=28738