Fix GDI+ string bustage in SVG builds. Bug 234959, patch by Bob Clary

<bc@bclary.com>, r=darin,afri, sr=bzbarsky

layout/svg/renderer/src/gdiplus/Makefile.in

@@ -50,6 +50,7 @@ REQUIRES = 	xpcom \
 			dom \
 			necko \
 			content \
+			unicharutil \
 			$(NULL)
 
 CPPSRCS = 	\

layout/svg/renderer/src/gdiplus/nsSVGGDIPlusGlyphMetrics.cpp

@@ -44,6 +44,7 @@
 #include <Gdiplus.h>
 using namespace Gdiplus;
 
+#include "nsUnicharUtils.h"
 #include "nsCOMPtr.h"
 #include "nsISVGGlyphMetricsSource.h"
 #include "nsPromiseFlatString.h"