[GDI32][LPK] BiDi support for ExtTextOut and GetCharacterPlacement (#534)

Introduce BiDi (bi-directional text) support for ExtTextOut and GetCharacterPlacement, using Wine's GDI BIDI_Reorder function.
Solves the main issue with CORE-7003.

To be compatible with Win2k3+, introduce the "Language Pack" (LPK) dll.
- All the bidi code is removed from gdi32 and replaced by calls to LPK.
  Gdi32 uses dynamic linking to lpk.dll. In case of linking failure no bidi processing will be available.
- Implemented LpkGetCharacterPlacement.
- Implement LpkExtTextOut.
- Add a demo test program to show how the apis should function.
- Added all the remaining code, added special case for lpDx calculation if also GCP_GLYPHSHAPE flag was called.
  Applications that call GCP that use GCP_GLYPHSHAPE flags should also use the GCP_REORDER flag.
  (As written in dd144860(v=vs.85).aspx )
- Add ETO_RTLREADING flag handling.
  Imported the ETO_RTLREADING flag handling from wine, which changes the string part order (runs).
  A RRR1LLLRRR2 string without will show as RRR1LLLRRR2 without it, with it RRR2LLLRRR1.

win32ss/gdi/gdi32/include/gdi32p.h

@@ -27,6 +27,34 @@ typedef INT
     HANDLE hPageQuery
 );
 
+typedef BOOL
+(WINAPI* LPKETO)(
+    HDC hdc,
+    int x,
+    int y,
+    UINT fuOptions,
+    const RECT *lprc,
+    LPCWSTR lpString,
+    UINT uCount,
+    const INT *lpDx,
+    INT unknown
+);
+
+typedef DWORD
+(WINAPI* LPKGCP)(
+    HDC hdc,
+    LPCWSTR lpString,
+    INT uCount,
+    INT nMaxExtent, 
+    LPGCP_RESULTSW lpResults,
+    DWORD dwFlags,
+    DWORD dwUnused
+);
+
+extern HINSTANCE hLpk;
+extern LPKETO LpkExtTextOut;
+extern LPKGCP LpkGetCharacterPlacement;
+
 /* DEFINES *******************************************************************/
 
 #define HANDLE_LIST_INC 20
@@ -36,6 +64,9 @@ typedef INT
 
 #define SAPCALLBACKDELAY 244
 
+#define LPK_ETO 1
+#define LPK_GCP 2
+
 /* MACRO ********************************************************************/
 
 #define ROP_USES_SOURCE(Rop)   (((Rop) << 2 ^ Rop) & 0xCC0000)
@@ -282,6 +313,12 @@ EnumLogFontExW2A(
     LPENUMLOGFONTEXA fontA,
     CONST ENUMLOGFONTEXW *fontW );
 
+BOOL
+WINAPI
+LoadLPK(
+    INT LpkFunctionID
+);
+
 BOOL
 WINAPI
 GetETM(HDC hdc,